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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 ## usage: subplot (rows, columns, index) |
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21 ## subplot (rcn) |
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22 ## |
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23 ## NOTE: this will work only with gnuplot installed with |
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24 ## multiplot patch (or version 3.6 beta) |
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25 ## |
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26 ## Sets gnuplot in multiplot mode and plots in location |
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27 ## given by index (there are columns X rows subwindows) |
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28 ## |
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29 ## Input: |
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30 ## |
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31 ## rows : number of rows in subplot grid |
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32 ## columns: number of columns in subplot grid |
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33 ## index : index of subplot where to make the next plot |
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34 ## |
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35 ## If only one arg, then it (crn) has to be three digit value |
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36 ## specifying the location in digit 1 (rows) and 2 (columns) and digit |
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37 ## 3 is the plot index |
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38 ## |
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39 ## The plot index runs row-wise,i.e., first all the columns in a row |
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40 ## are filled and then the next row is filled |
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41 ## |
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42 ## For example, plot with 4 X 2 grid, will have plot indices running as |
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43 ## follows: |
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44 ## |
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45 ## ----------------------------------- |
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46 ## | | | | | |
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47 ## | 1 | 2 | 3 | 4 | |
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48 ## | | | | | |
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49 ## ----------------------------------- |
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50 ## | | | | | |
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51 ## | 5 | 6 | 7 | 8 | |
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52 ## | | | | | |
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53 ## ----------------------------------- |
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54 ## |
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55 |
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56 ## Author: Vinayak Dutt <Dutt.Vinayak@mayo.EDU> |
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57 ## Adapted-By: jwe |
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58 |
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59 function subplot (rows, columns, index) |
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60 |
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61 if (! gnuplot_has_multiplot) |
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62 error ("subplot: gnuplot does not appear to support this feature"); |
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63 endif |
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64 |
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65 ## global variables to keep track of multiplot options |
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66 |
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67 global __multiplot_mode__ = 0; |
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68 global __multiplot_xsize__; |
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69 global __multiplot_ysize__; |
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70 global __multiplot_xn__; |
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71 global __multiplot_yn__; |
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72 global __multiplot_xi__; |
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73 global __multiplot_yi__; |
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74 |
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75 if (nargin != 3 && nargin != 1) |
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76 usage ("subplot (rows, columns, index) or subplot (rcn)"); |
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77 endif |
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78 |
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79 if (nargin == 1) |
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80 |
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81 if (! (is_scalar (rows) && rows >= 0)) |
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82 error ("subplot: input rcn has to be a positive scalar"); |
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83 endif |
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84 |
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85 tmp = rows; |
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86 index = rem (tmp, 10); |
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87 tmp = (tmp - index) / 10; |
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88 columns = rem (tmp, 10); |
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89 tmp = (tmp - columns) / 10; |
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90 rows = rem (tmp, 10); |
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91 |
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92 elseif (! (is_scalar (columns) && is_scalar (rows) && is_scalar (index))) |
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93 error ("subplot: columns, rows, and index have to be scalars"); |
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94 endif |
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95 |
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96 columns = round (columns); |
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97 rows = round (rows); |
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98 index = round (index); |
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99 |
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100 if (index > columns*rows) |
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101 error ("subplot: index must be less than columns*rows"); |
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102 endif |
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103 |
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104 if (columns < 1 || rows < 1 || index < 1) |
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105 error ("subplot: columns,rows,index must be be positive"); |
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106 endif |
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107 |
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108 if (columns*rows == 1) |
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109 |
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110 ## switching to single plot ? |
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111 |
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112 oneplot (); |
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113 |
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114 ## XXX FIXME XXX -- do we really need to reset these here? |
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115 |
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116 __multiplot_xn__ = 1; |
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117 __multiplot_yn__ = 1; |
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118 |
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119 else |
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120 |
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121 ## doing multiplot plots |
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122 |
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123 if (! __multiplot_mode__ |
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124 || __multiplot_xn__ != columns |
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125 || __multiplot_yn__ != rows) |
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126 |
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127 __multiplot_mode__ = 1; |
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128 __multiplot_xn__ = columns; |
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129 __multiplot_yn__ = rows; |
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130 __multiplot_xsize__ = 1.0 ./ columns; |
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131 __multiplot_ysize__ = 1.0 ./ rows; |
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132 |
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133 gnuplot_command_replot = "cle;rep"; |
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134 |
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135 gset multiplot; |
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136 |
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137 eval (sprintf ("gset size %g, %g", __multiplot_xsize__, |
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138 __multiplot_ysize__)); |
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139 endif |
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140 |
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141 ## get the sub plot location |
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142 |
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143 yp = fix ((index-1)/columns); |
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144 xp = index - yp*columns - 1; |
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145 __multiplot_xi__ = ++xp; |
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146 __multiplot_yi__ = ++yp; |
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147 |
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148 ## set the origin |
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149 |
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150 xo = (xp - 1.0) * __multiplot_xsize__; |
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151 yo = (rows - yp) * __multiplot_ysize__; |
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152 |
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153 eval (sprintf ("gset origin %g, %g", xo, yo)); |
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154 |
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155 endif |
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156 |
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157 endfunction |
