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- # Copyright (C) 1993, 1994, 1995 John W. Eaton
- #
- # This file is part of Octave.
- #
- # Octave is free software; you can redistribute it and/or modify it
- # under the terms of the GNU General Public License as published by the
- # Free Software Foundation; either version 2, or (at your option) any
- # later version.
- #
- # Octave is distributed in the hope that it will be useful, but WITHOUT
- # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- # for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with Octave; see the file COPYING. If not, write to the Free
- # Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- function mesh (x, y, z)
-
- # usage: mesh (x, y, z)
- #
- # See also: plot, semilogx, semilogy, loglog, polar, meshdom, contour,
- # bar, stairs, gplot, gsplot, replot, xlabel, ylabel, title
-
- if (nargin == 1)
- z = x;
- if (is_matrix (z))
- set hidden3d;
- set data style lines;
- set surface;
- set nocontour;
- set noparametric;
- set view 60, 30, 1, 1
- gsplot (z);
- else
- error ("mesh: argument must be a matrix");
- endif
- elseif (nargin == 3)
- if (is_vector (x) && is_vector (y) && is_matrix (z))
- xlen = length (x);
- ylen = length (y);
- if (xlen == rows (z) && ylen == columns (z))
- if (rows (x) == 1)
- x = x';
- endif
- len = 3 * ylen;
- zz = zeros (xlen, ylen);
- k = 1;
- for i = 1:3:len
- zz(:,i) = x;
- zz(:,i+1) = y(k) * ones (xlen, 1);
- zz(:,i+2) = z(:,k);
- k++;
- endfor
- set hidden3d;
- set data style lines;
- set surface;
- set nocontour;
- set parametric;
- set view 60, 30, 1, 1
- gsplot (zz);
- else
- msg = "mesh: rows (z) must be the same as length (x) and";
- msg = sprintf ("%s\ncolumns (z) must be the same as length (y)", msg);
- error (msg);
- endif
- else
- error ("mesh: x and y must be vectors and z must be a matrix");
- endif
- else
- usage ("mesh (z)");
- endif
-
- endfunction
-