function c = spring(m)
%SPRING Shades of magenta and yellow color map
%   SPRING(M) returns an M-by-3 matrix containing a "spring" colormap.
%   SPRING, by itself, is the same length as the current figure's
%   colormap. If no figure exists, MATLAB creates one.
%
%   For example, to reset the colormap of the current figure:
%
%       colormap(spring)
%
%   See also HSV, GRAY, HOT, BONE, COPPER, PINK, FLAG, 
%   COLORMAP, RGBPLOT.

%   Copyright 1984-2002 The MathWorks, Inc. 
%   $Revision: 1.8.4.1 $  $Date: 2004/11/29 23:32:26 $

if nargin < 1, m = size(get(gcf,'colormap'),1); end
r = (0:m-1)'/max(m-1,1); 
c = [ones(m,1) r 1-r];