graphxy.m

matlab算法集 matlab算法集

function graphxy (X,Y,caption,xaxis,yaxis,pts)
%----------------------------------------------------------------
% Usage:       graphxy (X,Y,caption,xaxis,yaxis,pts)
%
% Description: Graph the columns of Y vs. the columns of X
%
% Inputs:      X       = m by p matrix containing independent 
%                        variables (p = 1 or p = n)
%              Y       = m by n matrix containing dependent
%                        variables
%              caption = string containing graph title
%              xaxis   = string containing x-axis label
%              yaxis   = string containing y-axis label
%              pts     = optional display mode.  If pts is  
%                        present, then the last column of Y is
%                        plotted using isolated plot symbols 
%                        specified by the one-character string
%                        pts.  Examples include 's' for square,
%                        'd' for diamond and 'o' for circle.
%                        See help plot for more examples.  
%----------------------------------------------------------------
   colors = 'bgrcmy';
   [m,n] = size(Y);   
   p = size (X,2);
%   plotedit on
   figure
   zoom on
   box on
   points = nargin > 5;
   if ~points
      plot (real(X),real(Y))
   else
      hold on 
      for j = 1 : n-1
         k = 1 + rem(j-1,7);
         q = min (j,p);
         plot (real(X(:,q)),real(Y(:,j)),colors(k));
      end
      k = 1 + rem(n-1,7);
      q = min (n,p);
      plot (real(X(:,q)),real(Y(:,n)),[colors(k) pts(1)]);
      hold off
   end   
   title (caption)
   xlabel (xaxis)
   ylabel (yaxis)
   wait
%----------------------------------------------------------------