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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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5:f8c352d9af2d 6:60233b0075a9
1 \documentclass[10pt]{beamer}
2
3
4 \usetheme{Octave}
5 \usepackage{thumbpdf}
6 \usepackage{wasysym}
7 \usepackage{ucs}
8 \usepackage[utf8]{inputenc}
9 \usepackage{pgf,pgfarrows,pgfnodes,pgfautomata,pgfheaps,pgfshade}
10 \usepackage{verbatim}
11 \usepackage{listings}
12 \usepackage{attachfile}
13 \lstset{
14 language=C++,
15 keywordstyle=\bfseries\ttfamily\color[rgb]{0,0,1},
16 identifierstyle=\ttfamily,
17 commentstyle=\color[rgb]{0.133,0.545,0.133},
18 stringstyle=\ttfamily\color[rgb]{0.627,0.126,0.941},
19 showstringspaces=false,
20 basicstyle=\scriptsize,
21 numberstyle=\tiny,
22 numbers=left,
23 stepnumber=1,
24 numbersep=10pt,
25 tabsize=2,
26 breaklines=true,
27 prebreak = \raisebox{0ex}[0ex][0ex]{\ensuremath{\hookleftarrow}},
28 breakatwhitespace=false,
29 aboveskip={1.5\baselineskip},
30 columns=fixed,
31 upquote=true,
32 extendedchars=true,
33 }
34
35 %\pdfinfo
36 %{
37 % /Title (What is Octave?)
38 % /Creator (TeX)
39 % /Author (Jordi Guti\'errez Hermoso)
40 %}
41
42
43 \title{GNU Octave\\ A free high-level tool for Scientific Computing}
44 \author[cdf, jgh]{{\bf Carlo de Falco}, Jordi Guti\'errez Hermoso}
45 \date{May 21, 2013 - FEMTEC - Las Vegas}
46 \begin{document}
47
48 \frame[plain]{\titlepage}
49
50 \section*{}
51 \begin{frame}
52 \frametitle{Outline}
53 \tableofcontents[section=2]
54 \end{frame}
55
56 \AtBeginSection[]
57 {\frame<handout:0>{\frametitle{Outline}\tableofcontents[currentsection]}}
58
59 \AtBeginSubsection[]
60 {\frame<handout:0>{\frametitle{Outline}\tableofcontents[sectionstyle=show/hide,subsectionstyle=show/shaded/hide]}}
61
62 \newcommand<>{\highlighton}[1]{%
63 \alt#2{\structure{#1}}{{#1}}}
64
65 \newcommand{\icon}[1]{\pgfimage[height=1em]{#1}}
66
67
68
69 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
70 %%%%%%%%%% Content starts here %%%%%%%%%%
71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72
73 \section{What is Octave?}
74 \subsection{Definition}
75 \begin{frame}
76 \frametitle{What is Octave?}
77 \begin{block}{Octave}
78 {\it ``A \underline{free} \only<1->{\footnote{``free'' = ``libero'' $\neq$ ``gratis''}}
79 numerical environment mostly compatible with \sc{Matlab}''}\\[3mm]
80 \begin{itemize}
81 \item What is compatibility? A point of much debate...
82 \item If it works in
83 {\sc{Matlab}}, it should work in Octave.
84 \item If it breaks it is considered a bug.
85 \item If it works in Octave, it can break in {\sc{Matlab}}.
86 \end{itemize}
87 \end{block}
88 \end{frame}
89
90 \begin{frame}
91 \frametitle{Lines of code}
92 The stuff Octave is made of...
93 \pause
94 \begin{block}{Core}
95 \begin{itemize}
96 \item About 600,000 lines of C++
97 \item About 100,000 lines of m-scripts
98 \item About 50,000 lines of Fortran
99 \end{itemize}
100 \end{block}
101 \pause
102 \begin{block}{Octave-Forge}
103 \begin{itemize}
104 \item About 200,000 lines of C++
105 \item About 330,000 lines of m-scripts
106 \item About 50,000 lines of Fortran
107 \end{itemize}
108 \end{block}
109 \end{frame}
110
111
112 \begin{frame}
113 \frametitle{Features}
114 \begin{block}{Current features}
115 \begin{itemize}
116 \item N-d arrays, linear algebra, sparse matrices
117 \item Nonlinear equations
118 \item Partial/Ordinary/Algebraic Differential Equations,
119 \item Image processing, statistics, special functions
120 \item Many more...
121 \end{itemize}
122 \end{block}
123
124 \begin{block}{Features in development}
125 \begin{itemize}
126 \item GUI
127 \item JIT compiling
128 \item classdef OOP
129 %\item Least squares spectral analysis
130 \end{itemize}
131 \end{block}
132 \end{frame}
133
134 \begin{frame}
135 \frametitle{What does it look like}
136 \begin{itemize}
137 \only<1>{\item Primarily a CLI interface
138 \begin{figure}
139 \begin{center}
140 \includegraphics[height=.6\textheight]{screenshot}
141 \caption{CLI screenshot}\end{center}
142 \end{figure}}
143 \pause
144 \item Most requested feature: GUI!
145 \pause
146 \only<2->{\begin{figure}
147 \begin{center}
148 \includegraphics[height=.8\textheight]{gui_screenshot}
149 \caption{Qt based GUI Will ship with next release (4.0, expected 07/2013)}
150 \end{center}
151 \end{figure}}
152 \end{itemize}
153 \end{frame}
154
155
156 \subsection{History}
157
158 \begin{frame}
159 \frametitle{In the beginning... }
160
161
162 \begin{itemize}
163 \item Companion software for chemical reactor textbook by James B. Rawlings
164 and John G. Ekerdt
165 \item John W. Eaton (hereafter, jwe) started coding in 1993
166 \end{itemize}
167 \pause
168
169 \begin{block}{Rawlings said...}
170 \begin{quote}
171 \center Why don't you call it ``Octave''?
172 \end{quote}
173 \end{block}
174
175 \begin{itemize}
176 \item Octave refers to Octave Levenspiel, nothing to do with music ...
177 \end{itemize}
178
179 \end{frame}
180
181 \begin{frame}
182 \frametitle{jwe is a lone wolf...}
183
184 jwe works almost completely alone for first four or five years.
185
186 \pause
187
188 \begin{block}{In the very beginning...}
189 \begin{itemize}
190 \item No mailing lists
191 \item No widespread announcements
192 \item No VCS (these were dark times)
193 \end{itemize}
194 \end{block}
195 \end{frame}
196
197 \begin{frame}
198 \frametitle{Contributions slowly trickle in}
199 \begin{block}{Timeline}
200 \begin{itemize}
201 \item[1989] Planning stages
202 \item[1992] Development begins
203 \item[1993] First public announcement
204 \item[1994] Version 1.0
205 \item[1996] Version 2.0
206 \item[1998] Version 2.1 development
207 \item[2004] Version 2.9 in preparation for 3.0 release
208 \item[2007] Version 3.0 major upgrade
209 \item[2010] Version 3.2.4, last before using hg
210 \item[2011] Version 3.4.0
211 \item[2012] Version 3.6.4
212 \item[2012] Version 4.0
213 \end{itemize}
214 \end{block}
215 \end{frame}
216
217 \begin{frame}
218 \frametitle{Contributions slowly trickle in}
219 \begin{block}{Milestones}
220 \begin{itemize}
221 \item[1994] Most of the current basic functionality already in.
222 (Much was written during its first two years!)
223 \pause
224 \item[1995] Structs, {\sc{Matlab}}-style plot() command.
225 \item[1998] Original sparse matrix implementation
226 \item[2001] Octave-Forge's first commit
227 \item[2006] MEX interface in core
228 \item[2007] Implementation of handle graphics, full support for sparse matrices
229 \item[2009] OpenGL plotting
230 \item[2010] -forge option for pkg.m
231 \item[2011] Profiler
232 \item[2012] Nested functions
233 \pause
234 \item[2013] GUI, Java, 64bit indexing
235 \end{itemize}
236 \end{block}
237 \end{frame}
238
239
240 \subsection{Community dynamics}
241
242 \begin{frame}
243 \frametitle{Web resources}
244 \begin{block}{Web pages}
245 \begin{itemize}
246 \item \href{http://www.octave.org/}{Octave website}
247 \item \href{http://octave.sf.net/}{Octave-Forge website}
248 \item \href{http://wiki.octave.org/}{Octave wiki}
249 \end{itemize}
250 \end{block}
251
252 \begin{block}{Users communication}
253 \begin{itemize}
254 \item \href{https://mailman.cae.wisc.edu/listinfo/help-octave}{Octave users mailing list}
255 \item \href{https://lists.sourceforge.net/lists/listinfo/octave-dev}{Octave-Forge mailing list}
256 \item \href{http://webchat.freenode.net/?channels=octave&uio=MT1mYWxzZSYyPXRydWUmMTI9dHJ1ZQda}
257 {\#octave channel in Freenode}
258 \item \href{http://savannah.gnu.org/bugs/?group=octave}{Savannah bug tracker}
259 \end{itemize}
260 \end{block}
261 \pause
262 \begin{block}{Developers collaboration}
263 \begin{itemize}
264 \item \href{http://hg.savannah.gnu.org/hgweb/octave/shortlog}{Octave Mercurial repository}
265 \item \href{http://sourceforge.net/p/octave/code}{Octave-Forge Subversion repository}
266 \end{itemize}
267 \end{block}
268 \end{frame}
269
270 \begin{frame}
271 \frametitle{Social structure}
272 \begin{itemize}
273 \item Like all free projects, every user is a potential developer.
274 \item 15 current Core developers (with write access to repo)
275 \only<1>{\begin{figure}
276 \centering
277 \includegraphics[width=.5\linewidth]{Core-Developers}
278 \end{figure}}
279 \only<2->{\item 49 currently registered 'Forge developers (38 active)}
280 \only<2>{\begin{figure}
281 \centering
282 \includegraphics[width=.6\linewidth]{Forge-developers}
283 \end{figure}}
284 \only<3->{\item 305 total contributors over all time\\}
285 {\only<3>{\includegraphics[width=.8\linewidth]{contribs1}}
286 \only<4>{\includegraphics[width=.8\linewidth]{contribs2}}}
287 \only<5->{\item How many users? Thousands? Millions?}
288 \end{itemize}
289 \end{frame}
290
291 \begin{frame}
292 \frametitle{From user to developer}
293 This is a FAQ
294 \pause
295 \begin{block}{How can I contribute?}
296 \begin{itemize}
297 \item Code (obviously)
298 \item Money (pay-what-you-need)
299 \item Documentation (especially examples)
300 \item Wiki maintenance
301 \item Help in the mailing list
302 \item Bug reporting
303 \end{itemize}
304 \end{block}
305 \pause
306 % Stick around this conference if you want to learn more about how to get involved!
307 \end{frame}
308
309 \begin{frame}
310 \frametitle{Student projects}
311 \begin{block}{Google Summer of Code }
312 \begin{itemize}
313 \item GSoC 2011
314 \begin{itemize}
315 \item Daniel Kraft, Profiler
316 \end{itemize}
317 \item GSoC 2012
318 \begin{itemize}
319 \item Jacob Dawid, Qt GUI; Max Brister, JIT; Ben Lewis, LSSA
320 \end{itemize}
321 \item GSoC 2013
322 \begin{itemize}
323 \item 8 Slots this year!
324 \item JIT, ILU/ICHOL, FEM, Agora
325 \end{itemize}
326 \end{itemize}
327 \end{block}
328 \begin{block}{European Space Agency's Summer of Code in Space}
329 \begin{itemize}
330 \item SOCIS 2012
331 \begin{itemize}
332 \item Wendy Liu, Agora Octave; Andrius Sutas, Instrument-Control
333 \end{itemize}
334 \item SOCIS 2013
335 \begin{itemize}
336 \item Students apply!
337 \end{itemize}
338 \end{itemize}
339 \end{block}
340 \pause
341 % Stick around this conference if you want to learn more about how to get involved!
342 \end{frame}
343
344 \section{Octave and ...}
345 \subsection{Octave and Octave-Forge}
346
347 \begin{frame}[fragile]{Octave-Forge}
348 \begin{block}{Octave-Forge}
349 \href{http://octave.sf.net}{Octave Forge} Is a place for concurrently developing and distributing
350 extension packages for Octave.
351 \end{block}
352 \begin{itemize}
353 \item Each package has a \emph{maintainer} responsible for updating and releasing new versions of the package
354 \item Some packages are maintained by \emph{The Community}
355 \item Installation via an integrated \emph{package manager}
356 \end{itemize}
357 \end{frame}
358
359 \begin{frame}[fragile]{PKG}
360 \begin{lstlisting}[keywordstyle=]
361 >> pkg install -forge miscellaneous
362 For information about changes from previous versions of the miscellaneous package, run: news ("miscellaneous").
363 >> pkg list
364 Package Name | Version | Installation directory
365 ---------------------+---------+-----------------------
366 bim | 1.1.1 | ~/octave/bim-1.1.1
367 fpl | 1.3.3 | ~/octave/fpl-1.3.3
368 general | 1.3.1 | ~/octave/general-1.3.1
369 geometry | 1.6.0 | ~/octave/geometry-1.6.0
370 miscellaneous | 1.2.0 | ~/octave/miscellaneous-1.2.0
371 >> pkg load miscellaneous
372 >> pkg list
373 Package Name | Version | Installation directory
374 ---------------------+---------+-----------------------
375 bim | 1.1.1 | ~/octave/bim-1.1.1
376 fpl | 1.3.3 | ~/octave/fpl-1.3.3
377 general | 1.3.1 | ~/octave/general-1.3.1
378 geometry | 1.6.0 | ~/octave/geometry-1.6.0
379 miscellaneous *| 1.2.0 | ~/octave/miscellaneous-1.2.0
380 \end{lstlisting}
381 \end{frame}
382
383 \begin{frame}[fragile]{PKG}
384 \begin{lstlisting}[keywordstyle=]
385 >> pkg describe bim -verbose
386 ---
387 Package name:
388 bim
389 Version:
390 1.1.1
391 Short description:
392 Package for solving Diffusion Advection Reaction (DAR) Partial Differential Equations
393 Status:
394 Not loaded
395 ---
396 Provides:
397 Matrix assembly
398 bim1a_advection_diffusion
399 bim1a_advection_upwind
400 bim2a_advection_diffusion
401 ...
402 Pre-processing and Post-processing computations
403 bim2c_mesh_properties
404 ...
405 >>
406 \end{lstlisting}
407 \end{frame}
408
409
410 \subsection{Octave and Matlab}
411 \begin{frame}[fragile]{Broadcasting}
412 \begin{itemize}
413 \item Since 3.6.0, Octave automatically broadcasts arrays when using elementwise binary operators.
414 \item Corresponding array dimensions must either be equal or, one of them must be 1.
415 \item In case all dimensions are equal, ordinary element-by-element arithmetic takes place.
416 \item When one of the dimensions is 1, the array with that singleton dimension gets copied along
417 that dimension until it matches the dimension of the other array.
418 \end{itemize}
419
420 \end{frame}
421
422 \begin{frame}[fragile]{Broadcasting}
423 \scriptsize
424 \begin{lstlisting}[keywordstyle=]
425 x = [1 2 3; 4 5 6; 7 8 9];
426 y = [10 20 30];
427 x + y
428 11 22 33
429 14 25 36
430 17 28 39
431 \end{lstlisting}
432 \begin{itemize}
433 \item Without broadcasting, x + y would be an error because dimensions do not agree.
434 \item With broadcasting it is as if the following operation were performed
435 \end{itemize}
436 \scriptsize
437 \begin{lstlisting}[keywordstyle=]
438 x = [1 2 3;4 5 6;7 8 9];
439 y = [10 20 30; 10 20 30; 10 20 30];
440 x + y
441 11 22 33
442 14 25 36
443 17 28 39
444 \end{lstlisting}
445 \href{http://wiki.octave.org/FAQ#How_is_Octave_different_from_Matlab.3F}{Other notable differences with Matlab, listed in the wiki}
446 \end{frame}
447 \subsection{Octave and C++}
448
449 \begin{frame}[fragile]{dld-functions}
450 Implement an Octave interpreter function in C++
451 \vspace*{-4mm}
452 \only<1>{\lstinputlisting[language=C++,linerange=1-15,firstnumber=1]{./examples/dld.cc}}
453 \only<2>{\lstinputlisting[language=C++,linerange=16-30,firstnumber=last]{./examples/dld.cc}}
454 \only<3>{\lstinputlisting[keywordstyle=]{./examples/dld_run.txt}}
455 \vspace*{-4mm}
456 \attachfile[icon=Paperclip]{./examples/dld.cc}{source code of the example}
457 \end{frame}
458
459 \begin{frame}[fragile]{liboctave}
460 Use Octave's Matrix/Array Classes in a C++ application
461 \vspace*{-4mm}
462 \only<1>{\lstinputlisting[language=C++]{./examples/standalone.cc}}
463 \only<2>{\lstinputlisting[keywordstyle=]{./examples/standalone_run.txt}}
464 \vspace*{-4mm}
465 \attachfile[icon=Paperclip]{./examples/standalone.cc}{source code of the example}
466 \end{frame}
467
468 \begin{frame}[fragile]{Embedding Octave}
469 You can embed the Octave interpreter in your C++ application
470 \only<1>{\lstinputlisting[language=C++,linerange=1-17,firstnumber=1]{./examples/embedded.cc}}
471 \only<2>{\lstinputlisting[language=C++,linerange=18-29,firstnumber=last]{./examples/embedded.cc}}
472 \pause
473 \attachfile[icon=Paperclip]{./examples/embedded.cc}{source code of the example}
474 \end{frame}
475
476 \begin{frame}[fragile]{An advanced example}
477 Add a new class to the Octave interpreter and work around Octave's pass-by-value semantics\\
478 \attachfile[icon=Paperclip]{./examples/myobject.cc}{source code of the example (.cc)}\\
479 \attachfile[icon=Paperclip]{./examples/myobject.h}{source code of the example (.h)}
480 \end{frame}
481
482
483 \subsection{Octave and Parallel Computing}
484
485 \begin{frame}[fragile]{parcellfun and pararrayfun}
486 \scriptsize
487 Parcellfun is distributed in the package ``general'' it implements
488 parallelization via {\tt fork ()} and {\tt pipe ()}
489 \vspace*{-2mm}
490 \only<1>{\lstinputlisting[language=Octave,linerange=34-51,firstnumber=1]{./examples/parcellfun_example.m}}
491 \only<2>{\lstinputlisting[language=Octave,linerange=61-76,firstnumber=1]{./examples/parcellfun_example.m}}
492 %\vspace*{-4mm}
493 \attachfile[icon=Paperclip]{./examples/parcellfun_example.m}{source code of the example}
494 \end{frame}
495
496 \begin{frame}[fragile]{openmpi\_ext}
497 The package {\tt openmpi\_ext} provides wrappers for the main MPI functions in {\tt openmpi}
498
499 %\vspace*{-4mm}
500 \only<1>{\includegraphics[width=.9\linewidth]{openmpi_ext}}
501 \only<2>{\scalebox{.8}{\lstinputlisting[language=Octave,firstnumber=1]{./examples/Pi.m}}}
502 \only<3>{\scalebox{.8}{\lstinputlisting[language=Octave,firstnumber=1]{./examples/Pi_run.txt}}}
503 %\vspace*{-4mm}
504
505 \attachfile[icon=Paperclip]{./examples/parcellfun_example.m}{source code of the example}
506 \end{frame}
507
508 \section{PDEs and Octave}
509
510 \subsection{First order FEM/FVM for Diffusion Advection Reaction}
511 \begin{frame}[fragile]{Some interesting packages}
512 \only<1>{\includegraphics[width=.9\linewidth]{bim}}
513 \only<2>{\includegraphics[width=.9\linewidth]{msh}}
514 \only<3>{\includegraphics[width=.9\linewidth]{fpl}}
515 \href{http://wiki.octave.org/Bim_package}{usage examples in the wiki}
516 \end{frame}
517
518 \subsection{GeoPDEs - IGA in Octave}
519
520 \begin{frame}
521 \begin{center}
522 \includegraphics[width=.95\linewidth]{OctConf2013-700x214}
523 \end{center}
524 \begin{itemize}
525 \item MOX - Politecnico di Milano 24-26 June 2013
526 \item Register now!
527 \end{itemize}
528 \end{frame}
529
530 \begin{frame}
531 \frametitle{How to get Octave}
532 \begin{itemize}
533 \item Source on www.octave.org
534 \item Binaries on octave.sourceforge.net
535 \item Through package managers
536 \item In NCLab
537 \item I'll be available to help with installation.
538 \end{itemize}
539
540 \end{frame}
541
542
543 %
544 %\subsection{Octave and LifeV}
545 %\frame{}
546 %
547 %
548
549 \end{document}