matlab表面图的自定义颜色 [英] Custom colour for matlab surface plot

问题描述

我已经加载了一些地形数据到matlab，并创建了这些数据的surf，surfl和等值线图，使用颜色映射着色。

I have loaded in some topographic data to matlab, and created surf, surfl and contour plots of this data, colouring them using colormap. The topographic data ranges from 0 to 2500 m.

我想绘制一幅地图，使任何地形在200米以下，500米以上，200到500之间m绿色。有可能做到这一点吗？

I want to plot a map that colours any topography below 200 m blue, above 500 m red, and between 200 and 500 m green. Is it possible to do this? Could anyone give me any tips regarding the command required to do so?

非常感谢

推荐答案

您可以使用 colormap 和 surf 的第四个输入进行播放。

You may play with colormap and the fourth input of surf.

以下情节

由

[X,Y,Z] = peaks(1000);

%colormap
cmap = [0.6 0.2 0.4; 
        0.5 0.5 0.5; 
        0.1 0.9 0.9];  

Zcolor = zeros(size(Z));                   
threshold = 2;
Zcolor(Z <= -threshold)                 = 1;  % first row of cmap
Zcolor(Z > -threshold & Z < threshold)  = 2;  % second row of cmap
Zcolor(Z >= threshold)                  = 3;  % third row of cmap

figure('Color','w');
surf(X, Y, Z, Zcolor, 'EdgeColor', 'None');
colormap(cmap); 
light('Position', [0 -2 1])

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