Mercurial > hg > octave-terminal
changeset 1713:d9e42d0bab09
[project @ 1996-01-08 02:22:55 by jwe]
Initial revision
author | jwe |
---|---|
date | Mon, 08 Jan 1996 02:22:55 +0000 |
parents | 26a5b528968c |
children | b3a4b62884b9 |
files | scripts/plot/meshgrid.m |
diffstat | 1 files changed, 60 insertions(+), 0 deletions(-) [+] |
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new file mode 100644 --- /dev/null +++ b/scripts/plot/meshgrid.m @@ -0,0 +1,60 @@ +# 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 [xx, yy] = meshgrid (x, y) + +# usage: [xx, yy] = meshgrid (x, y) +# +# Given vectors of x and y coordinates, return two matrices corresponding +# to the x and y coordinates of a mesh. The rows of xx are copies of x, +# and the columns of yy are copies of y. +# +# [xx, yy] = meshgrid (x) is an abbreviation for [xx, yy] = meshgrid (x, x). +# +# See also: plot, semilogx, semilogy, loglog, polar, mesh, meshdom, contour, +# bar, stairs, gplot, gsplot, replot, xlabel, ylabel, title + + if (nargin == 1) + y = x; + endif + if (nargin > 0 && nargin < 3) + if (is_vector (x) && is_vector (y)) + xlen = length (x); + ylen = length (y); + xx = zeros (ylen, xlen); + yy = zeros (ylen, xlen); + if (columns (x) == 1) + x = x'; + endif + if (rows (y) == 1) + y = y'; + endif + for i = 1:ylen + xx(i,:) = x; + endfor + for i = 1:xlen + yy(:,i) = y; + endfor + else + error ("meshgrid: arguments must be vectors"); + endif + else + usage ("[xx, yy] = meshgrid (x, y)"); + endif + +endfunction