Mercurial > octave-nkf
annotate doc/interpreter/interpimages.m @ 9914:e76d8c767584
Switch to color output for PostScript documentation images
| author | Rik <rdrider0-list@yahoo.com> |
|---|---|
| date | Fri, 04 Dec 2009 10:44:58 -0800 |
| parents | e9fe12c1b0c0 |
| children | d9c8916bb9dd |
| rev | line source |
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| 8920 | 1 ## Copyright (C) 2007, 2008 David Bateman |
| 7018 | 2 ## |
| 3 ## This file is part of Octave. | |
| 4 ## | |
| 5 ## Octave is free software; you can redistribute it and/or modify it | |
| 6 ## under the terms of the GNU General Public License as published by | |
| 7 ## the Free Software Foundation; either version 3 of the License, or (at | |
| 8 ## your option) any later version. | |
| 9 ## | |
| 10 ## Octave is distributed in the hope that it will be useful, but | |
| 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 ## General Public License for more details. | |
| 14 ## | |
| 15 ## You should have received a copy of the GNU General Public License | |
| 16 ## along with Octave; see the file COPYING. If not, see | |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 18 | |
| 6721 | 19 function interpimages (nm, typ) |
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20 set_print_size (); |
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21 hide_output (); |
| 7257 | 22 if (strcmp (typ, "png")) |
| 23 set (0, "defaulttextfontname", "*"); | |
| 24 endif | |
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25 if (strcmp (typ, "eps")) |
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26 d_typ = "-depsc2"; |
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27 else |
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28 d_typ = cstrcat ("-d", typ); |
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29 endif |
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30 |
| 7262 | 31 if (strcmp (typ, "txt")) |
| 32 image_as_txt (nm); | |
| 33 elseif (strcmp (nm, "interpft")) | |
| 6721 | 34 t = 0 : 0.3 : pi; dt = t(2)-t(1); |
| 35 n = length (t); k = 100; | |
| 36 ti = t(1) + [0 : k-1]*dt*n/k; | |
| 37 y = sin (4*t + 0.3) .* cos (3*t - 0.1); | |
| 38 yp = sin (4*ti + 0.3) .* cos (3*ti - 0.1); | |
| 39 plot (ti, yp, 'g', ti, interp1(t, y, ti, 'spline'), 'b', ... | |
| 40 ti, interpft (y, k), 'c', t, y, 'r+'); | |
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41 legend ('sin(4t+0.3)cos(3t-0.1)','spline','interpft','data'); |
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42 print (cstrcat (nm, ".", typ), d_typ) |
| 6721 | 43 elseif (strcmp (nm, "interpn")) |
| 44 x = y = z = -1:1; | |
| 45 f = @(x,y,z) x.^2 - y - z.^2; | |
| 46 [xx, yy, zz] = meshgrid (x, y, z); | |
| 47 v = f (xx,yy,zz); | |
| 48 xi = yi = zi = -1:0.1:1; | |
| 49 [xxi, yyi, zzi] = ndgrid (xi, yi, zi); | |
| 50 vi = interpn(x, y, z, v, xxi, yyi, zzi, 'spline'); | |
| 6723 | 51 mesh (zi, yi, squeeze (vi(1,:,:))); |
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52 print (cstrcat (nm, ".", typ), d_typ) |
| 6743 | 53 elseif (strcmp (nm, "interpderiv1")) |
| 54 t = -2:2; | |
| 55 dt = 1; | |
| 56 ti =-2:0.025:2; | |
| 57 dti = 0.025; | |
| 58 y = sign(t); | |
| 59 ys = interp1(t,y,ti,'spline'); | |
| 60 yp = interp1(t,y,ti,'pchip'); | |
| 61 plot (ti, ys,'r-', ti, yp,'g-'); | |
| 62 legend('spline','pchip', 4); | |
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Rik <rdrider0-list@yahoo.com>
parents:
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63 print (cstrcat (nm, ".", typ), d_typ) |
| 6743 | 64 elseif (strcmp (nm, "interpderiv2")) |
| 65 t = -2:2; | |
| 66 dt = 1; | |
| 67 ti =-2:0.025:2; | |
| 68 dti = 0.025; | |
| 69 y = sign(t); | |
| 6721 | 70 ddys = diff(diff(interp1(t,y,ti,'spline'))./dti)./dti; |
| 71 ddyp = diff(diff(interp1(t,y,ti,'pchip'))./dti)./dti; | |
| 6743 | 72 plot (ti(2:end-1),ddys,'r*', ti(2:end-1),ddyp,'g+'); |
| 73 legend('spline','pchip'); | |
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74 print (cstrcat (nm, ".", typ), d_typ) |
| 6721 | 75 endif |
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76 hide_output (); |
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77 endfunction |
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78 |
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79 function set_print_size () |
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Rik <rdrider0-list@yahoo.com>
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80 image_size = [5.0, 3.5]; # in inches, 16:9 format |
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81 border = 0; # For postscript use 50/72 |
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82 set (0, "defaultfigurepapertype", "<custom>"); |
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Rik <rdrider0-list@yahoo.com>
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83 set (0, "defaultfigurepaperorientation", "landscape"); |
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e9fe12c1b0c0
Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents:
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84 set (0, "defaultfigurepapersize", image_size + 2*border); |
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e9fe12c1b0c0
Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents:
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85 set (0, "defaultfigurepaperposition", [border, border, image_size]); |
| 6721 | 86 endfunction |
| 87 | |
| 88 ## Use this function before plotting commands and after every call to | |
| 89 ## print since print() resets output to stdout (unfortunately, gnpulot | |
| 90 ## can't pop output as it can the terminal type). | |
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9912
e9fe12c1b0c0
Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents:
9298
diff
changeset
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91 function hide_output () |
| 6721 | 92 f = figure (1); |
| 93 set (f, "visible", "off"); | |
| 94 endfunction | |
| 7262 | 95 |
| 96 ## generate something for the texinfo @image command to process | |
| 97 function image_as_txt(nm) | |
| 98 fid = fopen (sprintf ("%s.txt", nm), "wt"); | |
| 99 fputs (fid, "\n"); | |
| 100 fputs (fid, "+---------------------------------+\n"); | |
| 101 fputs (fid, "| Image unavailable in text mode. |\n"); | |
| 102 fputs (fid, "+---------------------------------+\n"); | |
| 103 fclose (fid); | |
| 104 endfunction |