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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: function __plt__ (caller, ...) |
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21 |
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22 ## Author: jwe |
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23 |
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24 function __plt__ (caller, ...) |
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25 |
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26 if (nargin == 2) |
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27 |
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28 __plt1__ (va_arg (), ""); |
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29 |
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30 elseif (nargin > 2) |
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31 |
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32 first_plot = 1; |
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33 hold_state = ishold (); |
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34 |
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35 unwind_protect |
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36 |
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37 x = va_arg (); |
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38 nargin = nargin - 2; |
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39 x_set = 1; |
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40 y_set = 0; |
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41 |
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42 ## Gather arguments, decode format, and plot lines. |
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43 |
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44 while (nargin-- > 0) |
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45 |
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46 fmt = ""; |
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47 new = va_arg (); |
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48 |
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49 if (isstr (new)) |
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50 if (! x_set) |
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51 error ("plot: no data to plot"); |
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52 endif |
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53 fmt = __pltopt__ (caller, new); |
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54 if (! y_set) |
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55 __plt1__ (x, fmt); |
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56 else |
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57 __plt2__ (x, y, fmt); |
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58 endif |
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59 hold on; |
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60 x_set = 0; |
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61 y_set = 0; |
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62 elseif (x_set) |
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63 if (y_set) |
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64 __plt2__ (x, y, fmt); |
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65 hold on; |
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66 x = new; |
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67 y_set = 0; |
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68 else |
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69 y = new; |
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70 y_set = 1; |
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71 endif |
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72 else |
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73 x = new; |
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74 x_set = 1; |
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75 endif |
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76 |
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77 endwhile |
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78 |
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79 ## Handle last plot. |
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80 |
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81 if (x_set) |
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82 if (y_set) |
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83 __plt2__ (x, y, fmt); |
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84 else |
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85 __plt1__ (x, fmt); |
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86 endif |
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87 endif |
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88 |
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89 unwind_protect_cleanup |
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90 |
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91 if (! hold_state) |
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92 hold off; |
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93 endif |
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94 |
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95 end_unwind_protect |
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96 |
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97 else |
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98 |
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99 msg = sprintf ("%s (x)\n", caller); |
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100 msg = sprintf ("%s %s (x, y)\n", msg, caller); |
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101 msg = sprintf ("%s %s (x2, y1, x2, y2)\n", msg, caller); |
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102 msg = sprintf ("%s %s (x, y, fmt)", msg, caller); |
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103 usage (msg); |
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104 |
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105 endif |
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106 |
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107 endfunction |
