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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 nargs = nargin (); |
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29 |
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30 if (nargs == 2) |
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31 |
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32 __plt1__ (varargin{1}, ""); |
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33 |
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34 elseif (nargs > 2) |
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35 |
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36 first_plot = 1; |
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37 hold_state = ishold (); |
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38 |
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39 unwind_protect |
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40 |
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41 k = 1; |
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42 x = varargin{k++}; |
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43 nargs -= 2; |
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44 x_set = 1; |
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45 y_set = 0; |
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46 |
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47 ## Gather arguments, decode format, and plot lines. |
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48 |
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49 while (nargs-- > 0) |
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50 |
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51 fmt = ""; |
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52 new = varargin{k++}; |
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53 |
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54 if (isstr (new)) |
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55 if (! x_set) |
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56 error ("plot: no data to plot"); |
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57 endif |
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58 fmt = __pltopt__ (caller, new); |
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59 if (! y_set) |
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60 __plt1__ (x, fmt); |
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61 else |
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62 __plt2__ (x, y, fmt); |
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63 endif |
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64 hold on; |
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65 x_set = 0; |
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66 y_set = 0; |
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67 elseif (x_set) |
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68 if (y_set) |
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69 __plt2__ (x, y, fmt); |
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70 hold on; |
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71 x = new; |
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72 y_set = 0; |
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73 else |
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74 y = new; |
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75 y_set = 1; |
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76 endif |
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77 else |
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78 x = new; |
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79 x_set = 1; |
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80 endif |
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81 |
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82 endwhile |
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83 |
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84 ## Handle last plot. |
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85 |
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86 if (x_set) |
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87 if (y_set) |
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88 __plt2__ (x, y, fmt); |
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89 else |
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90 __plt1__ (x, fmt); |
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91 endif |
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92 endif |
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93 |
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94 unwind_protect_cleanup |
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95 |
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96 if (! hold_state) |
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97 hold off; |
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98 endif |
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99 |
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100 end_unwind_protect |
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101 |
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102 else |
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103 |
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104 msg = sprintf ("%s (x)\n", caller); |
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105 msg = sprintf ("%s %s (x, y)\n", msg, caller); |
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106 msg = sprintf ("%s %s (x2, y1, x2, y2)\n", msg, caller); |
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107 msg = sprintf ("%s %s (x, y, fmt)", msg, caller); |
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108 usage (msg); |
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109 |
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110 endif |
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111 |
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112 endfunction |
