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femtec presentation
author Carlo de Falco <cdf@users.sourceforge.net>
date Sun, 23 Jun 2013 23:37:41 +0200
parents PoliMI2012/what-is-octave.tex@f8c352d9af2d
children
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1 \documentclass[10pt]{beamer}
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4 \usetheme{Octave}
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5 \usepackage{thumbpdf}
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6 \usepackage{wasysym}
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7 \usepackage{ucs}
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8 \usepackage[utf8]{inputenc}
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9 \usepackage{pgf,pgfarrows,pgfnodes,pgfautomata,pgfheaps,pgfshade}
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10 \usepackage{verbatim}
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11 \usepackage{listings}
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12 \usepackage{attachfile}
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13 \lstset{
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14 language=C++,
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15 keywordstyle=\bfseries\ttfamily\color[rgb]{0,0,1},
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27 prebreak = \raisebox{0ex}[0ex][0ex]{\ensuremath{\hookleftarrow}},
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29 aboveskip={1.5\baselineskip},
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30 columns=fixed,
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31 upquote=true,
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32 extendedchars=true,
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33 }
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35 %\pdfinfo
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36 %{
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37 % /Title (What is Octave?)
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38 % /Creator (TeX)
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39 % /Author (Jordi Guti\'errez Hermoso)
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40 %}
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42
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43 \title{GNU Octave\\ A free high-level tool for Scientific Computing}
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44 \author[cdf, jgh]{{\bf Carlo de Falco}, Jordi Guti\'errez Hermoso}
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45 \date{May 21, 2013 - FEMTEC - Las Vegas}
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46 \begin{document}
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48 \frame[plain]{\titlepage}
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50 \section*{}
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51 \begin{frame}
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52 \frametitle{Outline}
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53 \tableofcontents[section=2]
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54 \end{frame}
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55
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56 \AtBeginSection[]
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57 {\frame<handout:0>{\frametitle{Outline}\tableofcontents[currentsection]}}
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59 \AtBeginSubsection[]
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60 {\frame<handout:0>{\frametitle{Outline}\tableofcontents[sectionstyle=show/hide,subsectionstyle=show/shaded/hide]}}
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62 \newcommand<>{\highlighton}[1]{%
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63 \alt#2{\structure{#1}}{{#1}}}
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65 \newcommand{\icon}[1]{\pgfimage[height=1em]{#1}}
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69 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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70 %%%%%%%%%% Content starts here %%%%%%%%%%
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71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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72
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73 \section{What is Octave?}
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74 \subsection{Definition}
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75 \begin{frame}
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76 \frametitle{What is Octave?}
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77 \begin{block}{Octave}
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78 {\it ``A \underline{free} \only<1->{\footnote{``free'' = ``libero'' $\neq$ ``gratis''}}
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79 numerical environment mostly compatible with \sc{Matlab}''}\\[3mm]
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80 \begin{itemize}
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81 \item What is compatibility? A point of much debate...
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82 \item If it works in
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83 {\sc{Matlab}}, it should work in Octave.
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84 \item If it breaks it is considered a bug.
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85 \item If it works in Octave, it can break in {\sc{Matlab}}.
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86 \end{itemize}
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87 \end{block}
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88 \end{frame}
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89
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90 \begin{frame}
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91 \frametitle{Lines of code}
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92 The stuff Octave is made of...
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93 \pause
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94 \begin{block}{Core}
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95 \begin{itemize}
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96 \item About 600,000 lines of C++
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97 \item About 100,000 lines of m-scripts
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98 \item About 50,000 lines of Fortran
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99 \end{itemize}
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100 \end{block}
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101 \pause
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102 \begin{block}{Octave-Forge}
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103 \begin{itemize}
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104 \item About 200,000 lines of C++
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105 \item About 330,000 lines of m-scripts
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106 \item About 50,000 lines of Fortran
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107 \end{itemize}
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108 \end{block}
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109 \end{frame}
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110
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111
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112 \begin{frame}
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113 \frametitle{Features}
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114 \begin{block}{Current features}
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115 \begin{itemize}
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116 \item N-d arrays, linear algebra, sparse matrices
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117 \item Nonlinear equations
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118 \item Partial/Ordinary/Algebraic Differential Equations,
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119 \item Image processing, statistics, special functions
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120 \item Many more...
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121 \end{itemize}
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122 \end{block}
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123
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124 \begin{block}{Features in development}
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125 \begin{itemize}
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126 \item GUI
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127 \item JIT compiling
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128 \item classdef OOP
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129 %\item Least squares spectral analysis
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130 \end{itemize}
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131 \end{block}
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132 \end{frame}
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133
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134 \begin{frame}
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135 \frametitle{What does it look like}
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136 \begin{itemize}
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137 \only<1>{\item Primarily a CLI interface
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138 \begin{figure}
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139 \begin{center}
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140 \includegraphics[height=.6\textheight]{screenshot}
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141 \caption{CLI screenshot}\end{center}
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142 \end{figure}}
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143 \pause
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144 \item Most requested feature: GUI!
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145 \pause
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146 \only<2->{\begin{figure}
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147 \begin{center}
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148 \includegraphics[height=.8\textheight]{gui_screenshot}
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149 \caption{Qt based GUI Will ship with next release (4.0, expected 07/2013)}
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150 \end{center}
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151 \end{figure}}
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152 \end{itemize}
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153 \end{frame}
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154
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155
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156 \subsection{History}
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157
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158 \begin{frame}
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159 \frametitle{In the beginning... }
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160
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161
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162 \begin{itemize}
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163 \item Companion software for chemical reactor textbook by James B. Rawlings
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164 and John G. Ekerdt
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165 \item John W. Eaton (hereafter, jwe) started coding in 1993
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166 \end{itemize}
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167 \pause
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168
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169 \begin{block}{Rawlings said...}
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170 \begin{quote}
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171 \center Why don't you call it ``Octave''?
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172 \end{quote}
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173 \end{block}
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174
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175 \begin{itemize}
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176 \item Octave refers to Octave Levenspiel, nothing to do with music ...
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177 \end{itemize}
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178
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179 \end{frame}
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180
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181 \begin{frame}
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182 \frametitle{jwe is a lone wolf...}
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183
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184 jwe works almost completely alone for first four or five years.
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185
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186 \pause
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187
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188 \begin{block}{In the very beginning...}
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189 \begin{itemize}
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190 \item No mailing lists
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191 \item No widespread announcements
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192 \item No VCS (these were dark times)
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193 \end{itemize}
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194 \end{block}
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195 \end{frame}
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196
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197 \begin{frame}
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198 \frametitle{Contributions slowly trickle in}
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199 \begin{block}{Timeline}
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200 \begin{itemize}
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201 \item[1989] Planning stages
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202 \item[1992] Development begins
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203 \item[1993] First public announcement
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204 \item[1994] Version 1.0
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205 \item[1996] Version 2.0
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206 \item[1998] Version 2.1 development
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207 \item[2004] Version 2.9 in preparation for 3.0 release
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208 \item[2007] Version 3.0 major upgrade
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209 \item[2010] Version 3.2.4, last before using hg
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210 \item[2011] Version 3.4.0
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211 \item[2012] Version 3.6.4
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212 \item[2012] Version 4.0
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213 \end{itemize}
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214 \end{block}
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215 \end{frame}
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216
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217 \begin{frame}
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218 \frametitle{Contributions slowly trickle in}
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219 \begin{block}{Milestones}
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220 \begin{itemize}
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221 \item[1994] Most of the current basic functionality already in.
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222 (Much was written during its first two years!)
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223 \pause
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224 \item[1995] Structs, {\sc{Matlab}}-style plot() command.
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225 \item[1998] Original sparse matrix implementation
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226 \item[2001] Octave-Forge's first commit
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227 \item[2006] MEX interface in core
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228 \item[2007] Implementation of handle graphics, full support for sparse matrices
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229 \item[2009] OpenGL plotting
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230 \item[2010] -forge option for pkg.m
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231 \item[2011] Profiler
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232 \item[2012] Nested functions
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233 \pause
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234 \item[2013] GUI, Java, 64bit indexing
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235 \end{itemize}
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236 \end{block}
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237 \end{frame}
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238
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239
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240 \subsection{Community dynamics}
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241
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242 \begin{frame}
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243 \frametitle{Web resources}
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244 \begin{block}{Web pages}
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245 \begin{itemize}
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246 \item \href{http://www.octave.org/}{Octave website}
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247 \item \href{http://octave.sf.net/}{Octave-Forge website}
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248 \item \href{http://wiki.octave.org/}{Octave wiki}
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249 \end{itemize}
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250 \end{block}
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251
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252 \begin{block}{Users communication}
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253 \begin{itemize}
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254 \item \href{https://mailman.cae.wisc.edu/listinfo/help-octave}{Octave users mailing list}
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255 \item \href{https://lists.sourceforge.net/lists/listinfo/octave-dev}{Octave-Forge mailing list}
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256 \item \href{http://webchat.freenode.net/?channels=octave&uio=MT1mYWxzZSYyPXRydWUmMTI9dHJ1ZQda}
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257 {\#octave channel in Freenode}
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258 \item \href{http://savannah.gnu.org/bugs/?group=octave}{Savannah bug tracker}
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259 \end{itemize}
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260 \end{block}
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261 \pause
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262 \begin{block}{Developers collaboration}
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263 \begin{itemize}
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264 \item \href{http://hg.savannah.gnu.org/hgweb/octave/shortlog}{Octave Mercurial repository}
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265 \item \href{http://sourceforge.net/p/octave/code}{Octave-Forge Subversion repository}
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266 \end{itemize}
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267 \end{block}
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268 \end{frame}
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269
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270 \begin{frame}
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271 \frametitle{Social structure}
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272 \begin{itemize}
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273 \item Like all free projects, every user is a potential developer.
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274 \item 15 current Core developers (with write access to repo)
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275 \only<1>{\begin{figure}
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276 \centering
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277 \includegraphics[width=.5\linewidth]{Core-Developers}
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278 \end{figure}}
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279 \only<2->{\item 49 currently registered 'Forge developers (38 active)}
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280 \only<2>{\begin{figure}
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281 \centering
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282 \includegraphics[width=.6\linewidth]{Forge-developers}
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283 \end{figure}}
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284 \only<3->{\item 305 total contributors over all time\\}
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285 {\only<3>{\includegraphics[width=.8\linewidth]{contribs1}}
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286 \only<4>{\includegraphics[width=.8\linewidth]{contribs2}}}
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287 \only<5->{\item How many users? Thousands? Millions?}
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288 \end{itemize}
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289 \end{frame}
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290
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291 \begin{frame}
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292 \frametitle{From user to developer}
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293 This is a FAQ
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294 \pause
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295 \begin{block}{How can I contribute?}
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296 \begin{itemize}
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297 \item Code (obviously)
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298 \item Money (pay-what-you-need)
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299 \item Documentation (especially examples)
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300 \item Wiki maintenance
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301 \item Help in the mailing list
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302 \item Bug reporting
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303 \end{itemize}
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304 \end{block}
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305 \pause
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306 % Stick around this conference if you want to learn more about how to get involved!
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307 \end{frame}
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308
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309 \begin{frame}
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310 \frametitle{Student projects}
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311 \begin{block}{Google Summer of Code }
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312 \begin{itemize}
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313 \item GSoC 2011
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314 \begin{itemize}
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315 \item Daniel Kraft, Profiler
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316 \end{itemize}
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317 \item GSoC 2012
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318 \begin{itemize}
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319 \item Jacob Dawid, Qt GUI; Max Brister, JIT; Ben Lewis, LSSA
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320 \end{itemize}
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321 \item GSoC 2013
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322 \begin{itemize}
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323 \item 8 Slots this year!
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324 \item JIT, ILU/ICHOL, FEM, Agora
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325 \end{itemize}
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326 \end{itemize}
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327 \end{block}
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328 \begin{block}{European Space Agency's Summer of Code in Space}
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329 \begin{itemize}
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330 \item SOCIS 2012
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331 \begin{itemize}
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332 \item Wendy Liu, Agora Octave; Andrius Sutas, Instrument-Control
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333 \end{itemize}
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334 \item SOCIS 2013
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335 \begin{itemize}
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336 \item Students apply!
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337 \end{itemize}
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338 \end{itemize}
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339 \end{block}
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340 \pause
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341 % Stick around this conference if you want to learn more about how to get involved!
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342 \end{frame}
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343
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344 \section{Octave and ...}
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345 \subsection{Octave and Octave-Forge}
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346
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347 \begin{frame}[fragile]{Octave-Forge}
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348 \begin{block}{Octave-Forge}
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349 \href{http://octave.sf.net}{Octave Forge} Is a place for concurrently developing and distributing
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350 extension packages for Octave.
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351 \end{block}
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352 \begin{itemize}
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353 \item Each package has a \emph{maintainer} responsible for updating and releasing new versions of the package
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354 \item Some packages are maintained by \emph{The Community}
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355 \item Installation via an integrated \emph{package manager}
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356 \end{itemize}
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357 \end{frame}
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358
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359 \begin{frame}[fragile]{PKG}
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360 \begin{lstlisting}[keywordstyle=]
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361 >> pkg install -forge miscellaneous
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362 For information about changes from previous versions of the miscellaneous package, run: news ("miscellaneous").
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363 >> pkg list
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364 Package Name | Version | Installation directory
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365 ---------------------+---------+-----------------------
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366 bim | 1.1.1 | ~/octave/bim-1.1.1
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367 fpl | 1.3.3 | ~/octave/fpl-1.3.3
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368 general | 1.3.1 | ~/octave/general-1.3.1
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369 geometry | 1.6.0 | ~/octave/geometry-1.6.0
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370 miscellaneous | 1.2.0 | ~/octave/miscellaneous-1.2.0
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371 >> pkg load miscellaneous
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372 >> pkg list
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373 Package Name | Version | Installation directory
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374 ---------------------+---------+-----------------------
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375 bim | 1.1.1 | ~/octave/bim-1.1.1
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376 fpl | 1.3.3 | ~/octave/fpl-1.3.3
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377 general | 1.3.1 | ~/octave/general-1.3.1
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378 geometry | 1.6.0 | ~/octave/geometry-1.6.0
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379 miscellaneous *| 1.2.0 | ~/octave/miscellaneous-1.2.0
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380 \end{lstlisting}
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381 \end{frame}
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382
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383 \begin{frame}[fragile]{PKG}
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384 \begin{lstlisting}[keywordstyle=]
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385 >> pkg describe bim -verbose
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386 ---
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387 Package name:
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388 bim
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389 Version:
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390 1.1.1
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391 Short description:
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392 Package for solving Diffusion Advection Reaction (DAR) Partial Differential Equations
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393 Status:
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394 Not loaded
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395 ---
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396 Provides:
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397 Matrix assembly
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398 bim1a_advection_diffusion
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399 bim1a_advection_upwind
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400 bim2a_advection_diffusion
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401 ...
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402 Pre-processing and Post-processing computations
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403 bim2c_mesh_properties
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404 ...
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405 >>
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406 \end{lstlisting}
0
Jordi Gutiérrez Hermoso <jordigh@octave.org>
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407 \end{frame}
Jordi Gutiérrez Hermoso <jordigh@octave.org>
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408
4
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409
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410 \subsection{Octave and Matlab}
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411 \begin{frame}[fragile]{Broadcasting}
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412 \begin{itemize}
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413 \item Since 3.6.0, Octave automatically broadcasts arrays when using elementwise binary operators.
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414 \item Corresponding array dimensions must either be equal or, one of them must be 1.
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415 \item In case all dimensions are equal, ordinary element-by-element arithmetic takes place.
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416 \item When one of the dimensions is 1, the array with that singleton dimension gets copied along
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417 that dimension until it matches the dimension of the other array.
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418 \end{itemize}
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419
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420 \end{frame}
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421
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422 \begin{frame}[fragile]{Broadcasting}
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423 \scriptsize
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424 \begin{lstlisting}[keywordstyle=]
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425 x = [1 2 3; 4 5 6; 7 8 9];
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426 y = [10 20 30];
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427 x + y
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428 11 22 33
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429 14 25 36
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430 17 28 39
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431 \end{lstlisting}
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432 \begin{itemize}
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433 \item Without broadcasting, x + y would be an error because dimensions do not agree.
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434 \item With broadcasting it is as if the following operation were performed
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435 \end{itemize}
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436 \scriptsize
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437 \begin{lstlisting}[keywordstyle=]
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438 x = [1 2 3;4 5 6;7 8 9];
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439 y = [10 20 30; 10 20 30; 10 20 30];
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440 x + y
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441 11 22 33
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442 14 25 36
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443 17 28 39
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444 \end{lstlisting}
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445 \href{http://wiki.octave.org/FAQ#How_is_Octave_different_from_Matlab.3F}{Other notable differences with Matlab, listed in the wiki}
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446 \end{frame}
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447 \subsection{Octave and C++}
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448
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449 \begin{frame}[fragile]{dld-functions}
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450 Implement an Octave interpreter function in C++
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451 \vspace*{-4mm}
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452 \only<1>{\lstinputlisting[language=C++,linerange=1-15,firstnumber=1]{./examples/dld.cc}}
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453 \only<2>{\lstinputlisting[language=C++,linerange=16-30,firstnumber=last]{./examples/dld.cc}}
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454 \only<3>{\lstinputlisting[keywordstyle=]{./examples/dld_run.txt}}
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455 \vspace*{-4mm}
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456 \attachfile[icon=Paperclip]{./examples/dld.cc}{source code of the example}
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457 \end{frame}
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458
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459 \begin{frame}[fragile]{liboctave}
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460 Use Octave's Matrix/Array Classes in a C++ application
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461 \vspace*{-4mm}
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462 \only<1>{\lstinputlisting[language=C++]{./examples/standalone.cc}}
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463 \only<2>{\lstinputlisting[keywordstyle=]{./examples/standalone_run.txt}}
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464 \vspace*{-4mm}
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465 \attachfile[icon=Paperclip]{./examples/standalone.cc}{source code of the example}
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466 \end{frame}
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467
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468 \begin{frame}[fragile]{Embedding Octave}
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469 You can embed the Octave interpreter in your C++ application
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470 \only<1>{\lstinputlisting[language=C++,linerange=1-17,firstnumber=1]{./examples/embedded.cc}}
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471 \only<2>{\lstinputlisting[language=C++,linerange=18-29,firstnumber=last]{./examples/embedded.cc}}
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472 \pause
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473 \attachfile[icon=Paperclip]{./examples/embedded.cc}{source code of the example}
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474 \end{frame}
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475
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476 \begin{frame}[fragile]{An advanced example}
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477 Add a new class to the Octave interpreter and work around Octave's pass-by-value semantics\\
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478 \attachfile[icon=Paperclip]{./examples/myobject.cc}{source code of the example (.cc)}\\
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479 \attachfile[icon=Paperclip]{./examples/myobject.h}{source code of the example (.h)}
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480 \end{frame}
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481
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482
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483 \subsection{Octave and Parallel Computing}
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484
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485 \begin{frame}[fragile]{parcellfun and pararrayfun}
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486 \scriptsize
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487 Parcellfun is distributed in the package ``general'' it implements
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488 parallelization via {\tt fork ()} and {\tt pipe ()}
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489 \vspace*{-2mm}
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490 \only<1>{\lstinputlisting[language=Octave,linerange=34-51,firstnumber=1]{./examples/parcellfun_example.m}}
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491 \only<2>{\lstinputlisting[language=Octave,linerange=61-76,firstnumber=1]{./examples/parcellfun_example.m}}
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492 %\vspace*{-4mm}
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493 \attachfile[icon=Paperclip]{./examples/parcellfun_example.m}{source code of the example}
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494 \end{frame}
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495
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496 \begin{frame}[fragile]{openmpi\_ext}
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497 The package {\tt openmpi\_ext} provides wrappers for the main MPI functions in {\tt openmpi}
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498
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499 %\vspace*{-4mm}
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500 \only<1>{\includegraphics[width=.9\linewidth]{openmpi_ext}}
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501 \only<2>{\scalebox{.8}{\lstinputlisting[language=Octave,firstnumber=1]{./examples/Pi.m}}}
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502 \only<3>{\scalebox{.8}{\lstinputlisting[language=Octave,firstnumber=1]{./examples/Pi_run.txt}}}
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503 %\vspace*{-4mm}
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504
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505 \attachfile[icon=Paperclip]{./examples/parcellfun_example.m}{source code of the example}
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506 \end{frame}
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507
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508 \section{PDEs and Octave}
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509
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510 \subsection{First order FEM/FVM for Diffusion Advection Reaction}
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511 \begin{frame}[fragile]{Some interesting packages}
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512 \only<1>{\includegraphics[width=.9\linewidth]{bim}}
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513 \only<2>{\includegraphics[width=.9\linewidth]{msh}}
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514 \only<3>{\includegraphics[width=.9\linewidth]{fpl}}
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515 \href{http://wiki.octave.org/Bim_package}{usage examples in the wiki}
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516 \end{frame}
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517
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518 \subsection{GeoPDEs - IGA in Octave}
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519
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520 \begin{frame}
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521 \begin{center}
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522 \includegraphics[width=.95\linewidth]{OctConf2013-700x214}
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523 \end{center}
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524 \begin{itemize}
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525 \item MOX - Politecnico di Milano 24-26 June 2013
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526 \item Register now!
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527 \end{itemize}
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528 \end{frame}
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529
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530 \begin{frame}
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531 \frametitle{How to get Octave}
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532 \begin{itemize}
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533 \item Source on www.octave.org
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534 \item Binaries on octave.sourceforge.net
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535 \item Through package managers
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536 \item In NCLab
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537 \item I'll be available to help with installation.
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538 \end{itemize}
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539
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540 \end{frame}
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541
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542
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543 %
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544 %\subsection{Octave and LifeV}
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545 %\frame{}
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546 %
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547 %
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548
0
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549 \end{document}