如何更改Trisurf图的颜色图以更好地区分正/负值 [英] How can I change colormap of trisurf plot to better differentiate positive/negative values

问题描述

我有一个trisurf图，该图在零以上.如何更改颜色图，以便我进行颜色编码，以使表面上大于零的部分为蓝色，而小于零的部分为红色?

I have a trisurf plot that goes above and below zero. How do I change the colormap such that I color code so that portions of the surface greater than zero are blue and portions below zero are red?

推荐答案

您可以自己构建这样的颜色图.举个例子:

You can build such a colormap yourself. Take this example:

r = [1 0 0];       %# start
w = [.9 .9 .9];    %# middle
b = [0 0 1];       %# end

%# colormap of size 64-by-3, ranging from red -> white -> blue
c1 = zeros(32,3); c2 = zeros(32,3);
for i=1:3
    c1(:,i) = linspace(r(i), w(i), 32);
    c2(:,i) = linspace(w(i), b(i), 32);
end
c = [c1(1:end-1,:);c2];

surf(peaks), shading interp
caxis([-8 8]), colormap(c), colorbar

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