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1 ## Copyright (C) 1996, 1997 John W. Eaton |
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2 ## |
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3 ## This program is free software; you can redistribute it and/or modify |
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4 ## it under the terms of the GNU General Public License as published by |
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5 ## the Free Software Foundation; either version 2, or (at your option) |
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6 ## any later version. |
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7 ## |
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8 ## This program is distributed in the hope that it will be useful, but |
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9 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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11 ## General Public License for more details. |
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12 ## |
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13 ## You should have received a copy of the GNU General Public License |
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14 ## along with this program; see the file COPYING. If not, write to the |
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15 ## Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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16 ## 02111-1307, USA. |
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17 |
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18 ## -*- texinfo -*- |
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19 ## @deftypefn {Function File} {} meshc (@var{x}, @var{y}, @var{z}) |
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20 ## Plot a mesh given matrices @var{x}, and @var{y} from @code{meshdom} and |
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21 ## a matrix @var{z} corresponding to the @var{x} and @var{y} coordinates of |
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22 ## the mesh. If @var{x} and @var{y} are vectors, then a typical vertex |
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23 ## is (@var{x}(j), @var{y}(i), @var{z}(i,j)). Thus, columns of @var{z} |
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24 ## correspond to different @var{x} values and rows of @var{z} correspond |
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25 ## to different @var{y} values. |
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26 ## @end deftypefn |
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27 ## @seealso{plot, semilogx, semilogy, loglog, polar, meshgrid, meshdom, |
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28 ## contour, bar, stairs, gplot, gsplot, replot, xlabel, ylabel, and title} |
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29 |
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30 ## Author: jwe |
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31 ## Modified: 2000-11-17 Paul Kienzle <kienzle.powernet.co.uk> |
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32 ## copied from Octave 2.1.31 mesh.m, with contours turned on |
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33 ## if added to octave, make __mesh__.m which takes the usual paramters |
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34 ## in addition to 'surface' and 'contour' so that this code gets reused. |
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35 |
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36 function meshc (x, y, z) |
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37 |
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38 ## XXX FIXME XXX -- the plot states should really just be set |
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39 ## temporarily, probably inside an unwind_protect block, but there is |
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40 ## no way to determine their current values. |
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41 |
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42 if (nargin == 1) |
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43 z = x; |
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44 if (is_matrix (z)) |
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45 gset hidden3d; |
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46 gset data style lines; |
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47 gset surface; |
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48 gset contour; |
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49 gset noparametric; |
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50 gset view 60, 30, 1, 1 |
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51 gsplot (z'); |
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52 else |
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53 error ("mesh: argument must be a matrix"); |
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54 endif |
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55 elseif (nargin == 3) |
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56 if (is_vector (x) && is_vector (y) && is_matrix (z)) |
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57 xlen = length (x); |
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58 ylen = length (y); |
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59 if (xlen == columns (z) && ylen == rows (z)) |
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60 if (rows (y) == 1) |
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61 y = y'; |
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62 endif |
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63 len = 3 * xlen; |
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64 zz = zeros (ylen, len); |
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65 k = 1; |
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66 for i = 1:3:len |
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67 zz(:,i) = x(k) * ones (ylen, 1); |
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68 zz(:,i+1) = y; |
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69 zz(:,i+2) = z(:,k); |
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70 k++; |
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71 endfor |
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72 gset hidden3d; |
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73 gset data style lines; |
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74 gset surface; |
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75 gset contour; |
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76 gset parametric; |
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77 gset view 60, 30, 1, 1 |
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78 gsplot (zz); |
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79 gset noparametric; |
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80 else |
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81 msg = "mesh: rows (z) must be the same as length (y) and"; |
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82 msg = sprintf ("%s\ncolumns (z) must be the same as length (x)", msg); |
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83 error (msg); |
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84 endif |
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85 elseif (is_matrix (x) && is_matrix (y) && is_matrix (z)) |
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86 xlen = columns (z); |
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87 ylen = rows (z); |
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88 if (xlen == columns (x) && xlen == columns (y) && |
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89 ylen == rows (x) && ylen == rows(y)) |
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90 len = 3 * xlen; |
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91 zz = zeros (ylen, len); |
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92 k = 1; |
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93 for i = 1:3:len |
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94 zz(:,i) = x(:,k); |
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95 zz(:,i+1) = y(:,k); |
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96 zz(:,i+2) = z(:,k); |
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97 k++; |
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98 endfor |
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99 gset hidden3d; |
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100 gset data style lines; |
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101 gset surface; |
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102 gset contour; |
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103 gset parametric; |
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104 gset view 60, 30, 1, 1 |
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105 gsplot (zz); |
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106 gset noparametric; |
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107 else |
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108 error ("mesh: x, y, and z must have same dimensions"); |
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109 endif |
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110 else |
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111 error ("mesh: x and y must be vectors and z must be a matrix"); |
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112 endif |
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113 else |
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114 usage ("mesh (z)"); |
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115 endif |
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116 |
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117 endfunction |
