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    %% Change Fill Colors for Contour Plot
% This example shows how to change the colors used in a filled
% contour plot.
%
%% Change Colormap
% Set the colors for the filled contour plot by changing the colormap. Pass
% the predefined colormap name, |hot|, to the |colormap| function.

% Copyright 2015 The MathWorks, Inc.


[X,Y,Z] = peaks;
figure
contourf(X,Y,Z,20)
colormap(hot)
title('Hot Colormap') 

%% Control Mapping of Data Values to Colormap
% Use only the colors in the center of the |hot| colormap by setting
% the color axis scaling to a range much larger than the
% range of values in matrix |Z|. The |caxis| function controls the mapping of
% data values into the colormap. Use this function to set the color axis
% scaling.

caxis([-20,20])
title('Center of Hot Colormap')