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1 Octave PROJECTS -*- text -*- |
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2 =============== |
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3 |
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4 Check with bug-octave@bevo.che.wisc.edu for a possibly more current |
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5 copy. Also, if you start working steadily on a project, please let |
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6 bug-octave@bevo.che.wisc.edu know. We might have information that |
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7 could help you; we'd also like to send you the GNU coding standards. |
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8 |
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9 This list is not exclusive -- there are many other things that might |
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10 be good projects, but it might instead be something we already have, |
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11 so check with bug-octave@bevo.che.wisc.edu before you start. |
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12 |
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13 --------- |
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14 Numerical: |
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15 --------- |
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16 |
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17 * Merge control stuff. |
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18 |
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19 * Improve logm, and sqrtm. |
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20 |
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21 * Improve complex mapper functions. |
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22 |
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23 * Make functions like gamma() return the right IEEE Inf or NaN |
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24 values for extreme args or other undefined cases. |
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25 |
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26 * Handle complex values in fread and fwrite. |
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27 |
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28 * Support for lp_solve for linear programming problems. |
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29 |
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30 * Free QP solver. |
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31 |
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32 * Free NLP solver. |
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33 |
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34 * Support for sparse matrices. |
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35 |
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36 * Fix CollocWt to handle Laguerre polynomials. Make it easy to |
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37 extend it to other polynomial types. |
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38 |
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39 * Add optional arguments to colloc so that it's not restricted to |
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40 Legendre polynomials. |
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41 |
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42 * Fix eig to also be able to solve the generalized eigenvalue |
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43 problem, and to solve for eigenvalues and eigenvectors without |
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44 performing a balancing step first. |
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45 |
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46 * Move rand, eye, xpow, xdiv, etc., functions to the matrix classes. |
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47 |
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48 * Use octave_allocator for memory management in Array classes once |
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49 g++ supports static member templates. |
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50 |
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51 * Implement the following functions: |
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52 -- ppval -- cross -- dot |
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53 |
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54 * When constructing NLConst (and other) objects, make sure that |
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55 there are sufficient checks to ensure that the dimensions all |
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56 conform. |
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57 |
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58 * Allow parameters to be passed through the call to fsolve() to the |
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59 user-supplied function for Matlab compatibility. Don't place an |
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60 upper limit on the number of arguments. |
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61 |
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62 * Check matrix classes for proper handling of empty matrices. |
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63 |
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64 * Force all empty matrices to be 0x0 even when other dimensions have |
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65 been speicified, for compatibility with Matlab, at least when some |
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66 preference variable is set. |
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67 |
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68 * Make operations with empty matrices produce empty matrices, for |
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69 compatibility with Matlab (but only if Matlab 5 still does things |
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70 this way). For example: [1, 2] * [] ==> []. |
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71 |
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72 * Should any ([]) return [] or 0? What about all ([])? |
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73 |
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74 * Improve design of ODE, DAE, classes. |
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75 |
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76 * Make it possible to specify a time which dassl and lsode should |
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77 not integrate past. |
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78 |
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79 * Add interface to daspk (new version of dassl). |
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80 |
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81 * Extend meaning of .* to include v .* M or M .* v (where v is a |
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82 column vector with the same number of rows as M) to scale rows of |
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83 M by elements of v. Similarly, if w is a row vector with as many |
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84 columns as M, then either w .* M or M .* w scales the columns of |
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85 M. |
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86 |
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87 * Add support for +=, -=, etc. |
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88 |
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89 * Given two vectors x and y of length m and n, implement a function |
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90 outer (x, y, f) that returns an m-by-n matrix with entries |
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91 f (x(i), y(j)). If f is omitted, multiplication is the default. |
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92 Should probably work for any vectors, not just if x is a column |
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93 vector and y is a row vector. |
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94 |
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95 * Make it possible to solve b = L \ x efficiently, either by |
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96 providing an explicit function call, or by automatically |
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97 determining that L is triangular. If it is done automatically, |
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98 provide some means for determining whether Octave has actually |
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99 detected that the matrix is triangular. |
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100 |
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101 * The polyfit function uses the economy QR factorization, but even |
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102 that can take a lot of time for large datasets. Consider an |
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103 option to compute the result with inv (A' * A) * A' * y or some |
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104 other faster method.d Possibly just switch to this method if the |
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105 dataset is larger than some value. |
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106 |
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107 * Consider making the behavior of the / and \ operators for |
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108 non-square systems compatible with Matlab. |
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109 |
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110 -------- |
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111 Graphics: |
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112 -------- |
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113 |
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114 * Make plotting with plplot work. |
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115 |
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116 * Fix interface with gnuplot to wait for gnuplot to output any text |
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117 before octave returns a prompt. Possible by implementing two |
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118 way communication between gnuplot and Octave. |
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119 |
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120 * Make gsave (and possibly gload) work. Implement gsave by having it |
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121 also alter the plot command to not use temporary files (perhaps |
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122 with some user-specified template for naming them) and then |
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123 sending a `save' command to gnuplot. |
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124 |
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125 * It would be nice to be able to check that a plot is currently |
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126 being displayed. |
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127 |
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128 * Implement clf, gcf, get, set, orient, print, close, etc. in |
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129 Matlab-compatible ways. |
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130 |
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131 * Make it possible to check the current graphics terminal type. |
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132 |
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133 * If possible, pass data to gnuplot without using temporary files. |
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134 |
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135 * If using temporary files, delete them when gnuplot exits. |
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136 |
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137 * If possible, pass binary data to gnuplot to speed things up. |
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138 |
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139 * If using gnuplot, consider setting a smaller default for the |
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140 `zero' value (e.g., set zero sqrt (realmin) or something). |
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141 |
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142 ------- |
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143 Strings: |
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144 ------- |
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145 |
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146 * Improve performance of string functions, particularly for |
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147 searching and replacing. |
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148 |
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149 * Provide some regex matching functions. |
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150 |
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151 * Convert string functions to work on string arrays. |
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152 |
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153 * Make find work for strings. |
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154 |
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155 * Consider making octave_print_internal() print some sort of text |
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156 representation for unprintable characters instead of sending them |
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157 directly to the terminal. (But don't do this for fprintf!) |
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158 |
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159 * Consider changing the default value of `string_fill_char' from SPC |
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160 to NUL. |
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161 |
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162 * Consider making ["test", []] ==> "test", for compatibility with |
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163 Matlab, at least when some set of preferences are set. |
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164 |
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165 ---------------- |
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166 Other Data Types: |
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167 ---------------- |
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168 |
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169 * New types (char, short, etc.). |
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170 |
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171 * 3d matrix stuff. |
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172 |
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173 * Template functions for mixed-type ops. |
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174 |
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175 * Stuff for arithmetic using charMatrix, intMatrix, etc. |
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176 |
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177 ------------------------ |
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178 Graphical User Interface: |
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179 ------------------------ |
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180 |
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181 * In an X11 or other windowing environment, allow the user to pop up |
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182 windows for menus and other purposes. A good place to start might |
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183 be Tk, as long as Tcl is avoided. |
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184 |
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185 * Add a way to handle events, like alarms, mouse clicks, etc. |
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186 |
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187 ------------ |
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188 Input/Output: |
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189 ------------ |
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190 |
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191 * Make fread and fwrite work for complex data. Iostreams based |
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192 versions of these functions would also be nice, and if you are |
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193 working on them, it would be good to support other size |
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194 specifications (integer*2, etc.). |
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195 |
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196 * Make load and save work for structures. |
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197 |
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198 * Make load and save look for <file>.mat if only given <file>. |
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199 |
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200 Potential sticky points: |
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201 |
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202 - For load, if both foo and foo.mat exist, should it prefer foo |
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203 or foo.mat? Should the preference depend on the arguments to |
