How to use colormap/colorbar for plots

Question

Fernanda 2022-10-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1831898-how-to-use-colormap-colorbar-for-plots

评论： Adam Danz 2022-10-21

Hey everyone, when I plot my matrixs it works but now I want to add some color. I want the colors at each point to depend on the x and y coordinate so x+y. I hope that makes any sense. So the higher that x+y value is for a point the higher the color intensity is.

x = [0.5:2:18] ;

y = [30:10:100] ;

[a,b] = meshgrid(x,y);

plot(a,b,'ko',a, a+b,'ko');

colormap

ans = 256×3

0.2422 0.1504 0.6603 0.2444 0.1534 0.6728 0.2464 0.1569 0.6847 0.2484 0.1607 0.6961 0.2503 0.1648 0.7071 0.2522 0.1689 0.7179 0.2540 0.1732 0.7286 0.2558 0.1773 0.7393 0.2576 0.1814 0.7501 0.2594 0.1854 0.7610

colorbar