Adapt my colorbar to a specific value

Here is an example of a figure that you can find in the matlab help with the colorbar function.

My interrogation is very simple. I would like to set a specific color at a specific value on the colorbar. For instance, I would like to have cyan at 4 rather than 0. I don't just want to replace the color there, the goal is to adapt the rest of my colorbar to that value. In my example, I would like the blue shades to be between -6 and 4 and the rest of the colors to be between 4 and 8.

Anyone can help me please ?

Answer 1

[Gaétan Andriano]

Another way to do it on this link : https://fr.mathworks.com/matlabcentral/answers/1786555-is-it-possible-to-define-colormap-ranges-or-merge-colormaps

Answer 2

[Jiri Hajek]

Seems like you need to focus on colormap, that's the function which defines your color scale. Or maybe just change the scale for your plot, that way you may be able to shift the color levels, if that's sufficient for you.

[Gaétan Andriano]

Ok I understand the solution you propose but my goal is rather to automate this method depending on a condition (here a specific value of the colorbar). In the spirit of this, here is what I would like to do:

In this example, I would like to specify that the yellow is at the value 0

[Jiri Hajek]

Well, you have several options available, which will give you the desired value at zero, but what about the rest of the olorscale? Do you indeed want to have a different scale for multiple plots, which will share only the color at zero?

[Gaétan Andriano]

Yes, that's I would like to do. I want to keep the same colorscale and just set yellow at 0

[Jiri Hajek]

And what about keeping the whole colorscale fixed at such values, so that zero would be at yellow? In my eyes, that would be the best thing for comparability and generality of the solution - and simplicity, to be sure.

[Gaétan Andriano]

Finally, I found another another way to do it on this link : https://fr.mathworks.com/matlabcentral/answers/1786555-is-it-possible-to-define-colormap-ranges-or-merge-colormaps

Thanks for your help and I hope this link could help other users of Matlab