如何用使用不同颜色图的轮廓图覆盖pcolor图? [英] How to overlay a pcolor plot with a contour plot that uses a different colormap?
问题描述
无法实现的最小示例:
[X,Y,Z] = peaks;
figure;
pcolor(X,Y,Z);
shading flat;
hold all;
axes;
contour(X,Y,Z);
colormap gray; % this should only apply to the contour plot axes...
axis off; % ... but it doesn't
这同时显示了灰度色图中的轮廓图和伪色图.但是,我想要实现的只是将轮廓变成灰色.
This shows both the contour plot and the pseudo colour plot in the grayscale colourmap. However, what I want to achieve is only turning the contours gray.
这只是一个简单的示例,实际上等高线图是具有不同范围的不同数据的,因此也需要两个独立的caxis
设置.
This is just a minimalistic example, in reality the contour plot is of different data that has a different range, so two independent caxis
settings are required as well.
推荐答案
您可以通过链接两个颜色图,并确保函数的值能够访问颜色图的正确部分来解决此问题:>
You can fix the problem by catenating two colormaps, and making sure that the values of the functions are such that they access the right part of the colormap:
cm = [jet(64);gray(64)];
figure,
pcolor(X,Y,Z)
shading flat
hold on
%# Z in the contour starts after the maximum
%# of Z in pcolor
contour(X,Y,Z-min(Z(:))+max(Z(:))+2,'LineWidth',2)
%# apply the colormap
colormap(cm)
For a more convenient solution, you may also want to have a look at this file exchange pick of the week
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