Create Custom ColourBar

Hello!)

I wonder if this can be done in Matlab. I have three variables...for example as follows:

A=0 B=300 C=1000

Variable B always lies between A and C.....I wonder if it can be possible to add a colourbar to an existing chart in such a way that the A and C define minimum and maximum of the colourbar, while point B will define how much of the color bar will be colored in the colors which correspond to A and C....for example in the above case,

if A is Red and C is Black....the color bar would look in such a way so that the Red color would fade into white in the first 30% of the color bar (till point B, 300)....I will also need to label that point B on the color continuum...(30% of the A to D distance from point A and 70% distance from point D)

I will be happy to hear any suggestion.

Thanks!)

D

Answer 1

[Fangjun Jiang]

colormap()
caxis()

See this post. I think it might help you! http://www.mathworks.com/matlabcentral/answers/17594-create-a-surface-plot-with-colors-associated-to-value-on-cell

Something like this?

Red=1:-0.01:0;
Green=zeros(size(Red));
Blue=zeros(size(Red));
MyColor=[Red;Green;Blue]';

Data=1:10:1001;
pcolor([Data;Data]);
colormap(MyColor);
caxis([1 1000]);
colorbar;

[Dima]

thanks but I am not sure how to apply this to this question....Maybe you can help me with this??? you were kind to introduce me to Matlab before and I am able to do a few things now but at a loss as to how this can be done.

[Fangjun Jiang]

See the example in my answer.

Answer 2

[Image Analyst]

Try linspace(). Write back if you can't figure it out.