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1 ## Copyright (C) 1996 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 ## Originally written by Rick Niles <niles@axp745.gsfc.nasa.gov>. |
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21 |
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22 ## usage: fmt = plot_opt (caller, opt) |
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23 ## |
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24 ## Decode plot option strings. |
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25 ## |
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26 ## If OPT is a valid option string, return a string of the form "w l 2" |
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27 ## ("with lines 2"). Uses abbreviations for the options to avoid |
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28 ## overrunning gnuplot's command line buffer unnecessarily. |
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29 ## |
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30 ## OPT can currently be some combination of the following: |
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31 ## |
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32 ## "-" for lines plot style (default). |
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33 ## "." for dots plot style. |
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34 ## "@" for points plot style. |
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35 ## "-@" for linespoints plot style. |
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36 ## "^" for impulses plot style. |
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37 ## "L" for steps plot style. |
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38 ## "#" for boxes plot style. |
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39 ## "~" for errorbars plot style. |
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40 ## "#~" for boxerrorbars plot style. |
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41 ## "n" with n in 1-6 (wraps at 8), plot color |
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42 ## "nm" with m in 1-6 (wraps at 6), point style (only valid with "@" or "-@") |
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43 ## "c" where c is one of ["r", "g", "b", "m", "c", "w"] colors. |
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44 ## |
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45 ## Special points formats: |
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46 ## |
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47 ## "+", "*", "o", "x" will display points in that style. |
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48 ## |
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49 ## The legend may be fixed to include the name of the variable |
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50 ## plotted in some future version of Octave. |
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51 ## |
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52 ## The color line styles have the following meanings on terminals |
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53 ## that support color. |
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54 ## |
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55 ## Number Gnuplot colors (lines)points style |
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56 ## 1 red "*" |
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57 ## 2 green "+" |
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58 ## 3 blue "o" |
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59 ## 4 magenta "x" |
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60 ## 5 cyan house |
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61 ## 6 brown there exists |
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62 |
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63 ## Author: jwe |
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64 |
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65 function fmt = plot_opt (caller, opt) |
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66 |
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67 set_color = 0; |
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68 set_symbol = 0; |
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69 set_lines = 0; |
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70 set_dots = 0; |
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71 set_points = 0; |
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72 set_impulses = 0; |
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73 set_steps = 0; |
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74 set_boxes = 0; |
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75 set_errbars = 0; |
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76 more_opts = 1; |
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77 |
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78 WITH = "w"; |
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79 LINES = "l"; |
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80 LINESPOINTS = "linesp"; |
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81 BOXERRORBARS = "boxer"; |
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82 BOXES = "boxes"; |
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83 POINTS = "p"; |
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84 DOTS = "d"; |
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85 IMPULSES = "i"; |
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86 STEPS = "s"; |
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87 ERRORBARS = "e"; |
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88 |
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89 if (nargin != 2) |
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90 usage ("plot_opt (opt)"); |
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91 endif |
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92 |
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93 if (! isstr (opt)) |
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94 error ("plot_opt: argument must be a string"); |
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95 endif |
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96 |
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97 while (more_opts) |
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98 |
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99 ## First get next char. |
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100 |
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101 if (max (size (opt)) > 1) |
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102 [char, opt] = sscanf (opt, "%c %s", "C"); |
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103 else |
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104 char = opt; |
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105 more_opts = 0; |
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106 endif |
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107 |
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108 ## Now set flags based on char. |
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109 |
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110 if (strcmp (char, "-")) |
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111 set_lines = 1; |
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112 elseif (strcmp (char, ".")) |
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113 set_dots = 1; |
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114 elseif (strcmp (char, "@")) |
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115 set_points = 1; |
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116 elseif (strcmp (char, "^")) |
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117 set_impulses = 1; |
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118 elseif (strcmp (char, "L")) |
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119 set_steps = 1; |
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120 elseif (strcmp (char, "~")) |
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121 set_errbars = 1; |
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122 elseif (strcmp (char, "#")) |
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123 set_boxes = 1; |
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124 elseif (strcmp (char, "0") || strcmp (char, "1") ... |
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125 || strcmp (char, "2") || strcmp (char, "3") ... |
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126 || strcmp (char, "4") || strcmp (char, "5") ... |
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127 || strcmp (char, "6") || strcmp (char, "7") ... |
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128 || strcmp (char, "8") || strcmp (char, "9")) |
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129 if (set_color) |
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130 set_points = 1; |
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131 symbol = char; |
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132 set_symbol = 1; |
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133 else |
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134 color = char; |
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135 set_color = 1; |
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136 endif |
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137 elseif (strcmp (char, "r")) |
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138 set_color = 1; |
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139 color = "1"; |
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140 elseif (strcmp (char, "g")) |
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141 set_color = 1; |
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142 color = "2"; |
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143 elseif (strcmp (char, "b")) |
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144 set_color = 1; |
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145 color = "3"; |
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146 elseif (strcmp (char, "m")) |
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147 set_color = 1; |
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148 color = "4"; |
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149 elseif (strcmp (char, "c")) |
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150 set_color = 1; |
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151 color = "5"; |
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152 elseif (strcmp (char, "w")) |
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153 set_color = 1; |
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154 color = "6"; |
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155 elseif (strcmp (char, "*")) |
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156 set_points = 1; |
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157 set_symbol = 1; |
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158 symbol = "1"; |
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159 elseif (strcmp (char, "+")) |
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160 set_points = 1; |
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161 set_symbol = 1; |
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162 symbol = "2"; |
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163 elseif (strcmp (char, "o")) |
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164 set_points = 1; |
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165 set_symbol = 1; |
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166 symbol = "3"; |
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167 elseif (strcmp (char, "x")) |
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168 set_points = 1; |
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169 set_symbol = 1; |
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170 symbol = "4"; |
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171 else |
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172 error (sprintf ("%s: unrecognized format character %s", caller, char)); |
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173 endif |
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174 endwhile |
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175 |
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176 ## Now create format string. |
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177 |
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178 fmt = WITH; |
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179 |
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180 if (set_lines) |
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181 if (set_points) |
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182 fmt = strcat (fmt, " ", LINESPOINTS); |
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183 else |
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184 fmt = strcat (fmt, " ", LINES); |
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185 endif |
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186 elseif (set_boxes) |
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187 if (set_errbars) |
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188 fmt = strcat (fmt, " ", BOXERRORBARS); |
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189 else |
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190 fmt = strcat (fmt, " ", BOXES); |
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191 endif |
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192 elseif (set_points) |
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193 fmt = strcat (fmt, " ", POINTS); |
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194 elseif (set_dots) |
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195 fmt = strcat (fmt, " ", DOTS); |
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196 elseif (set_impulses) |
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197 fmt = strcat (fmt, " ", IMPULSES); |
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198 elseif (set_steps) |
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199 fmt = strcat (fmt, " ", STEPS); |
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200 elseif (set_errbars) |
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201 fmt = strcat (fmt, " ", ERRORBARS); |
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202 endif |
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203 |
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204 if (strcmp (fmt, WITH)) |
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205 fmt = strcat (fmt, " ", LINES); |
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206 endif |
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207 |
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208 if (set_color) |
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209 fmt = strcat (fmt, " ", color); |
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210 if (set_symbol) |
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211 fmt = strcat (fmt, " ", symbol); |
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212 endif |
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213 elseif (set_symbol) |
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214 fmt = strcat (fmt, " 1 ", symbol); |
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215 endif |
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216 |
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217 endfunction |
