how to get the RGB number from colorbar

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Yu Li
Yu Li el 18 de Abr. de 2019
Editada: Yu Li el 18 de Abr. de 2019
Hi:
I have a colorbar like below:
2.jpg
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

Respuestas (1)

Adam
Adam el 18 de Abr. de 2019
Editada: Adam el 18 de Abr. de 2019
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).
  1 comentario
Yu Li
Yu Li el 18 de Abr. de 2019
Editada: Yu Li el 18 de Abr. de 2019
Thanks for you reply.
you mentioned 'then interpolate it to make it bigger or smaller', could you please let me know how I can do that?
for example, the colormap is from blue ([0,0,255]) to red ([255,0,0]), is there anyway to interpolate 1000 colors between them?
Bests,
Yu

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