How to fix the mapping between colors and values?

5 次查看（过去 30 天）
zhehao.nkd
zhehao.nkd 2022-1-6
回答： zhehao.nkd 2022-1-6
I have a few matrices containing different integers, and I know all the possible intergers which can be found within these matrices. But not every integer will appear in each matrices, like:
% possible integers 0 1 2 3
x = randi([0 3],10,10); % from 0 to 3
y = randi([0 2],10,10); % from 0 to 2
z = randi([0 1],10,10); % from 0 to 1
Then how can I fix the mapping between matrix integers and RGB colors so that specific integer is always associated with specific color( as commented ) ?
cmap= [0 0 1;... % blue for 0
0 1 0;... % green for 1
1 0 0;... % red for 2
1 1 1]; % white for 3
figure;
imagesc(x);
colormap(cmap);
figure;
imagesc(y);
colormap(cmap);
figure;
imagesc(z);
colormap(cmap);

请先登录，再回答此问题。

采纳的回答

zhehao.nkd
zhehao.nkd 2022-1-6
I found out the solution by using
caxis manual
caxis([0,3]);
But the prerequisite is that the values should be linearlly distributed with the same gap in between.

更多回答（1 个）

KSSV
KSSV 2022-1-6
Ran in:
x = randi([0 3],10,10); % from 0 to 3
y = randi([0 2],10,10); % from 0 to 2
z = randi([0 1],10,10); % from 0 to 1
cmap= [0 0 1;... % blue for 0
0 1 0;... % green for 1
1 0 0;... % red for 2
1 1 1]; % white for 3
imagesc(x)
colormap(cmap)
colorbar

类别

在 Help Center 和 File Exchange 中查找有关 Colormaps 的更多信息

标签

产品


版本

R2020b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by