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1 ## Copyright (C) 2000, Teemu Ikonen |
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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} {} errorbar (@var{args}) |
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22 ## This function produces two-dimensional plots with errorbars. Many |
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23 ## different combinations of arguments are possible. The simplest form is |
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24 ## |
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25 ## @example |
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26 ## errorbar (@var{y}, @var{ey}) |
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27 ## @end example |
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28 ## |
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29 ## @noindent |
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30 ## where the first argument is taken as the set of @var{y} coordinates |
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31 ## and the second argument @var{ey} is taken as the errors of the |
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32 ## @var{y} values. @var{x} coordinates are taken to be the indices |
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33 ## of the elements, starting with 1. |
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34 ## |
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35 ## If more than two arguments are given, they are interpreted as |
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36 ## |
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37 ## @example |
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38 ## errorbar (@var{x}, @var{y}, ..., @var{fmt} ...) |
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39 ## @end example |
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40 ## |
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41 ## @noindent |
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42 ## where after @var{x} and @var{y} there can be up to four error |
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43 ## parameters such as @var{ey}, @var{ex}, @var{ly}, @var{uy} etc., |
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44 ## depending on the plot type. Any number of argument sets may appear, |
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45 ## as long as they are separated with a format string @var{fmt}. |
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46 ## |
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47 ## If @var{y} is a matrix, @var{x} and error parameters must also be matrices |
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48 ## having same dimensions. The columns of @var{y} are plotted versus the |
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49 ## corresponding columns of @var{x} and errorbars are drawn from |
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50 ## the corresponding columns of error parameters. |
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51 ## |
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52 ## If @var{fmt} is missing, yerrorbars ("~") plot style |
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53 ## is assumed. |
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54 ## If the @var{fmt} argument is supplied, it is interpreted as in |
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55 ## normal plots (See __pltopt__). In addition the following |
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56 ## plot styles are supported by errorbar: |
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57 ## |
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58 ## @table @samp |
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59 ## @item ~ |
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60 ## Set yerrorbars plot style (default). |
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61 ## |
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62 ## @item > |
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63 ## Set xerrorbars plot style. |
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64 ## |
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65 ## @item ~> |
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66 ## Set xyerrorbars plot style. |
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67 ## |
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68 ## @item # |
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69 ## Set boxes plot style. |
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70 ## |
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71 ## @item #~ |
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72 ## Set boxerrorbars plot style. |
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73 ## |
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74 ## @item #~> |
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75 ## Set boxxyerrorbars plot style. |
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76 ## |
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77 ## @end table |
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78 ## |
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79 ## Examples: |
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80 ## |
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81 ## @example |
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82 ## errorbar(@var{x}, @var{y}, @var{ex}, ">") |
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83 ## @end example |
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84 ## |
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85 ## xerrorbar plot of @var{y} versus @var{x} with @var{x} errorbars drawn from |
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86 ## @var{x}-@var{ex} to @var{x}+@var{ex}. |
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87 ## |
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88 ## @example |
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89 ## errorbar(@var{x}, @var{y1}, @var{ey}, "~", @var{x}, @var{y2}, @var{ly}, @var{uy}) |
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90 ## @end example |
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91 ## |
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92 ## Two yerrorbar plots with @var{y1} and @var{y2} versus @var{x}. |
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93 ## Errorbars for @var{y1} are drawn from @var{y1}-@var{ey} to |
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94 ## @var{y1}+@var{ey}, errorbars for @var{y2} from @var{y2}-@var{ly} to |
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95 ## @var{y2}+@var{uy}. |
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96 ## |
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97 ## @example |
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98 ## errorbar(@var{x}, @var{y}, @var{lx}, @var{ux}, @var{ly}, @var{uy}, "~>") |
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99 ## @end example |
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100 ## |
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101 ## xyerrorbar plot of @var{y} versus @var{x} where @var{x} errorbars |
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102 ## are drawn from @var{x}-@var{lx} to @var{x}+@var{ux} and @var{y} errorbars |
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103 ## from @var{y}-@var{ly} to @var{y}+@var{uy}. |
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104 ## |
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105 ## @end deftypefn |
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106 ## @seealso{semilogx, semilogy, loglog, polar, mesh, contour, __pltopt__, |
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107 ## bar, stairs, gplot, gsplot, replot, xlabel, ylabel, and title} |
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108 |
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109 ## Created: 18.7.2000 |
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110 ## Author: Teemu Ikonen <tpikonen@pcu.helsinki.fi> |
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111 ## Keywords: errorbar, plotting |
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112 |
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113 function errorbar (varargin) |
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114 |
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115 if (nargin < 2) |
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116 usage ("errorbar (...)"); |
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117 endif |
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118 |
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119 save_hold = ishold; |
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120 unwind_protect |
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121 if (! ishold) |
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122 clg () |
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123 endif |
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124 hold ("on"); |
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125 k = 1; |
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126 while (nargin) |
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127 a = varargin{k++}; |
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128 nargin--; |
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129 if (is_vector (a)) |
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130 a = a(:); |
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131 elseif (is_matrix (a)); |
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132 ; |
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133 else |
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134 usage ("errorbar (...)"); |
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135 endif |
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136 sz = size (a); |
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137 ndata = 1; |
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138 arg1 = a; |
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139 fmt = " "; |
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140 while (nargin) |
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141 nargin--; |
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142 a = varargin{k++}; |
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143 if (isstr (a)) |
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144 fmt = a; |
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145 cmd = "__errplot__ (arg1"; |
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146 for i = 2:ndata, |
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147 cmd = [cmd, sprintf(", arg%d",i)]; |
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148 endfor |
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149 cmd = [cmd, ", fmt);"]; |
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150 eval (cmd); |
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151 break; |
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152 elseif (is_vector (a)) |
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153 a = a(:); |
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154 elseif (is_matrix (a)) |
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155 ; |
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156 else |
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157 error ("wrong argument types"); |
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158 endif |
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159 if (size (a) != sz) |
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160 error ("argument sizes do not match"); |
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161 endif |
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162 ndata++; |
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163 eval (sprintf ("arg%d = a;", ndata)); |
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164 if (ndata > 6) |
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165 error ("too many arguments to a plot"); |
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166 endif |
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167 endwhile |
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168 endwhile |
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169 |
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170 if (! isstr (a)) |
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171 fmt = " "; |
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172 cmd = "__errplot__(arg1"; |
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173 for i = 2:ndata, |
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174 cmd = [cmd, sprintf(", arg%d",i)]; |
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175 endfor |
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176 cmd = [cmd, ", fmt);"]; |
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177 eval (cmd); |
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178 endif |
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179 unwind_protect_cleanup |
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180 if (! save_hold) |
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181 hold ("off"); |
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182 endif |
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183 end_unwind_protect |
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184 |
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185 endfunction |
