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1 ## Copyright (C) 1996, 1997 John W. Eaton |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 2, or (at your option) |
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8 ## any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} subplot (@var{rows}, @var{cols}, @var{index}) |
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22 ## @deftypefnx {Function File} {} subplot (@var{rcn}) |
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23 ## Sets @code{gnuplot} in multiplot mode and plots in location |
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24 ## given by index (there are @var{cols} by @var{rows} subwindows). |
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25 ## |
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26 ## The global variable @var{__multiplot_scale__} should be used when the |
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27 ## command @code{__gnuplot_set__ size xsize, ysize} has been used prior to calling |
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28 ## @code{subplot}. |
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29 ## |
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30 ## The value of @var{__multiplot_scale__} should be a vector with two |
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31 ## elements, the first set equal to @var{xsize} and the second to |
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32 ## @var{ysize}. |
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33 ## |
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34 ## Input: |
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35 ## |
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36 ## @table @var |
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37 ## @item rows |
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38 ## Number of rows in subplot grid. |
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39 ## |
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40 ## @item columns |
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41 ## Number of columns in subplot grid. |
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42 ## |
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43 ## @item index |
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44 ## Index of subplot where to make the next plot. |
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45 ## @end table |
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46 ## |
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47 ## If only one argument is supplied, then it must be a three digit value |
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48 ## specifying the location in digits 1 (rows) and 2 (columns) and the plot |
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49 ## index in digit 3. |
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50 ## |
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51 ## The plot index runs row-wise. First all the columns in a row are filled |
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52 ## and then the next row is filled. |
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53 ## |
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54 ## For example, a plot with 4 by 2 grid will have plot indices running as |
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55 ## follows: |
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56 ## @iftex |
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57 ## @tex |
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58 ## \vskip 10pt |
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59 ## \hfil\vbox{\offinterlineskip\hrule |
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60 ## \halign{\vrule#&&\qquad\hfil#\hfil\qquad\vrule\cr |
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61 ## height13pt&1&2&3&4\cr height12pt&&&&\cr\noalign{\hrule} |
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62 ## height13pt&5&6&7&8\cr height12pt&&&&\cr\noalign{\hrule}}} |
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63 ## \hfil |
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64 ## \vskip 10pt |
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65 ## @end tex |
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66 ## @end iftex |
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67 ## @ifinfo |
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68 ## @display |
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69 ## @group |
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70 ## +-----+-----+-----+-----+ |
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71 ## | 1 | 2 | 3 | 4 | |
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72 ## +-----+-----+-----+-----+ |
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73 ## | 5 | 6 | 7 | 8 | |
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74 ## +-----+-----+-----+-----+ |
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75 ## @end group |
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76 ## @end display |
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77 ## @end ifinfo |
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78 ## @end deftypefn |
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79 |
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80 ## Author: Vinayak Dutt <Dutt.Vinayak@mayo.EDU> |
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81 ## Adapted-By: jwe |
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82 |
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83 function subplot (rows, columns, index) |
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84 |
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85 ## global variables to keep track of multiplot options |
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86 |
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87 global __multiplot_mode__ = 0; |
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88 global __multiplot_xsize__; |
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89 global __multiplot_ysize__; |
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90 global __multiplot_xn__; |
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91 global __multiplot_yn__; |
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92 global __multiplot_xi__; |
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93 global __multiplot_yi__; |
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94 global __multiplot_scale__; |
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95 |
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96 if (isempty (__multiplot_scale__)) |
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97 __multiplot_scale__ = [1, 1]; |
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98 endif |
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99 |
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100 if (nargin != 3 && nargin != 1) |
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101 usage ("subplot (rows, columns, index) or subplot (rcn)"); |
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102 endif |
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103 |
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104 if (nargin == 1) |
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105 |
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106 if (! (isscalar (rows) && rows >= 0)) |
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107 error ("subplot: input rcn has to be a positive scalar"); |
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108 endif |
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109 |
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110 tmp = rows; |
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111 index = rem (tmp, 10); |
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112 tmp = (tmp - index) / 10; |
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113 columns = rem (tmp, 10); |
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114 tmp = (tmp - columns) / 10; |
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115 rows = rem (tmp, 10); |
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116 |
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117 elseif (! (isscalar (columns) && isscalar (rows) && isscalar (index))) |
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118 error ("subplot: columns, rows, and index have to be scalars"); |
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119 endif |
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120 |
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121 columns = round (columns); |
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122 rows = round (rows); |
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123 index = round (index); |
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124 |
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125 if (index > columns*rows) |
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126 error ("subplot: index must be less than columns*rows"); |
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127 endif |
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128 |
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129 if (columns < 1 || rows < 1 || index < 1) |
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130 error ("subplot: columns,rows,index must be be positive"); |
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131 endif |
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132 |
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133 if (columns*rows == 1) |
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134 |
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135 ## switching to single plot ? |
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136 |
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137 oneplot (); |
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138 |
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139 ## XXX FIXME XXX -- do we really need to reset these here? |
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140 |
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141 __multiplot_xn__ = 1; |
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142 __multiplot_yn__ = 1; |
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143 |
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144 else |
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145 |
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146 ## doing multiplot plots |
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147 |
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148 if (! __multiplot_mode__ |
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149 || __multiplot_xn__ != columns |
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150 || __multiplot_yn__ != rows) |
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151 |
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152 __multiplot_mode__ = 1; |
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153 __multiplot_xn__ = columns; |
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154 __multiplot_yn__ = rows; |
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155 __multiplot_xsize__ = __multiplot_scale__(1) ./ columns; |
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156 __multiplot_ysize__ = __multiplot_scale__(2) ./ rows; |
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157 |
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158 gnuplot_command_replot = "cle;rep"; |
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159 |
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160 __gnuplot_set__ multiplot; |
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161 |
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162 eval (sprintf ("__gnuplot_set__ size %g, %g", __multiplot_xsize__, |
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163 __multiplot_ysize__)); |
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164 endif |
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165 |
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166 ## get the sub plot location |
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167 |
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168 yp = fix ((index-1)/columns); |
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169 xp = index - yp*columns - 1; |
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170 __multiplot_xi__ = ++xp; |
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171 __multiplot_yi__ = ++yp; |
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172 |
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173 ## set the origin |
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174 |
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175 xo = (xp - 1.0) * __multiplot_xsize__; |
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176 yo = (rows - yp) * __multiplot_ysize__; |
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177 |
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178 eval (sprintf ("__gnuplot_set__ origin %g, %g", xo, yo)); |
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179 |
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180 endif |
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181 |
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182 endfunction |
