How to Setting Custom Colours in 4D figures (Slice Function)?

Question

changkun 2013-12-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/110532-how-to-setting-custom-colours-in-4d-figures-slice-function

编辑： Sean de Wolski 2014-1-7

 [x,y,z] = meshgrid(-2:.2:2,-2:.25:2,-2:.16:2);
v = x.*exp(-x.^2-y.^2-z.^2);
xslice = [-1.2,.8,2]; yslice = 2; zslice = [-2,0];
slice(x,y,z,v,xslice,yslice,zslice)

I want to change the colour according the value of v.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Sean de Wolski 2013-12-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/110532-how-to-setting-custom-colours-in-4d-figures-slice-function#answer_119177

编辑：Sean de Wolski 2014-1-7

在 MATLAB Online 中打开

The color right now is changed according to v...

That's why the color in the middle shows up.

More per clarification

Build another array, C, that will be an index into the colormap:

[x,y,z] = meshgrid(-2:.2:2,-2:.25:2,-2:.16:2);
v = x.*exp(-x.^2-y.^2-z.^2);
xslice = [-1.2,.8,2]; yslice = 2; zslice = [-2,0];
%
%v<0, blue; 0<=v<0.2, green; 0.2<=v, red.
%
C = ones(size(v)); %blue
C((v > 0) & (v < 0.2)) = 2; %green
C(v>=0.2) = 3; %red
colormap([0 0 1;0 1 0;1 0 0]); %bgr
slice(x,y,z,C,xslice,yslice,zslice)