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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} {} __plt__ (@code{caller}, @dots{}) |
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22 ## @end deftypefn |
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23 |
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24 ## Author: jwe |
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25 |
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26 function __plt__ (caller, varargin) |
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27 |
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28 if (nargin == 2) |
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29 |
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30 __plt1__ (varargin{1}, ""); |
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31 |
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32 elseif (nargin > 2) |
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33 |
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34 first_plot = 1; |
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35 hold_state = ishold (); |
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36 |
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37 unwind_protect |
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38 |
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39 k = 1; |
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40 x = varargin{k++}; |
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41 nargin = nargin - 2; |
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42 x_set = 1; |
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43 y_set = 0; |
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44 |
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45 ## Gather arguments, decode format, and plot lines. |
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46 |
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47 while (nargin-- > 0) |
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48 |
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49 fmt = ""; |
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50 new = varargin{k++}; |
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51 |
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52 if (isstr (new)) |
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53 if (! x_set) |
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54 error ("plot: no data to plot"); |
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55 endif |
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56 fmt = __pltopt__ (caller, new); |
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57 if (! y_set) |
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58 __plt1__ (x, fmt); |
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59 else |
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60 __plt2__ (x, y, fmt); |
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61 endif |
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62 hold on; |
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63 x_set = 0; |
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64 y_set = 0; |
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65 elseif (x_set) |
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66 if (y_set) |
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67 __plt2__ (x, y, fmt); |
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68 hold on; |
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69 x = new; |
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70 y_set = 0; |
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71 else |
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72 y = new; |
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73 y_set = 1; |
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74 endif |
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75 else |
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76 x = new; |
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77 x_set = 1; |
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78 endif |
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79 |
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80 endwhile |
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81 |
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82 ## Handle last plot. |
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83 |
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84 if (x_set) |
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85 if (y_set) |
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86 __plt2__ (x, y, fmt); |
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87 else |
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88 __plt1__ (x, fmt); |
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89 endif |
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90 endif |
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91 |
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92 unwind_protect_cleanup |
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93 |
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94 if (! hold_state) |
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95 hold off; |
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96 endif |
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97 |
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98 end_unwind_protect |
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99 |
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100 else |
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101 |
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102 msg = sprintf ("%s (x)\n", caller); |
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103 msg = sprintf ("%s %s (x, y)\n", msg, caller); |
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104 msg = sprintf ("%s %s (x2, y1, x2, y2)\n", msg, caller); |
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105 msg = sprintf ("%s %s (x, y, fmt)", msg, caller); |
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106 usage (msg); |
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107 |
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108 endif |
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109 |
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110 endfunction |
