Mercurial > octave-nkf
view scripts/sparse/gplot.m @ 5576:7e008607a86e
[project @ 2005-12-13 19:05:54 by jwe]
author | jwe |
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date | Tue, 13 Dec 2005 19:05:55 +0000 |
parents | |
children | 6ada1581e8b4 |
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## Copyright (C) 2005 Ivana Varekova ## ## This program 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 of the License, or ## (at your option) any later version. ## ## This program 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 this program; if not, write to the Free Software ## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA ## 02110-1301 USA ## -*- texinfo -*- ## @deftypefn {Function File} {} gplot (@var{a}, @var{xy}) ## @deftypefnx {Function File} {} gplot (@var{a}, @var{xy}, @var{LineSpec}) ## @deftypefnx {Function File} {[@var{x}, @var{y}] =} gplot (@var{a}, @var{xy}) ## Plots a graph defined by @var{A} and @var{xy} in the graph theory sense. ## @var{A} is the adjacency matrix of the array to be plotted and @var{xy} is a ## @var{n}-by-2 matrix containing the coordinates of the nodes of the graph. ## ## If defined, @var{LineStyle} defines the output style for the plot. Called ## with no output arguments the graph is plotted directly. Called with output ## arguments the coordinates of the plot are returned in @var{x} and @var{y}, ## rather than being plotted. ## @end deftypefn ## @seealso{treeplot,etreeplot,spy} function [x, y] = gplot (A, xy, LineStyle) if (nargin < 2 || nargin > 3 || nargout > 2) error ("gplot: wrong number of input/output arguments"); endif if (nargin == 2) LineStyle = "1;;"; endif [i,j] = find(A); xcoord = [xy(i,1), xy(j,1), NaN * ones(length(i),1)]'(:); ycoord = [xy(i,2), xy(j,2), NaN * ones(length(i),1)]'(:); if (nargout == 0) plot(xcoord,ycoord,LineStyle); else x = xcoord; y = ycoord; endif endfunction