how to get the RGB number from colorbar

Question

Yu Li 2019-4-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/457201-how-to-get-the-rgb-number-from-colorbar

编辑： Yu Li 2019-4-18

Hi:

I have a colorbar like below:

or to simplify this question, I assume the color is from blue (RGB [0,0,1]) to red (RGB [1,0,0]).

is there anyway to get the detail RGB nubmer for each color in this colorbar? in other words, I want to split the colorbar into 1000 parts, is there anyway to got the RGB number of each part?

Thanks!

Yu

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

Adam 2019-4-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/457201-how-to-get-the-rgb-number-from-colorbar#answer_371232

编辑：Adam 2019-4-18

在 MATLAB Online 中打开

colourmap = colormap( hAxes );

where hAxes is the axes handle. gca if you really must!

You can then interpolate it to make it bigger or smaller if you wish.

If it is a builtin colourmap though, for example 'Jet', you can just use

colourmap = jet( 1000 );

to get a 1000-element Jet colourmap (not that I am advising using Jet, it was just the one that came to mind and is most similar to the one you show).