How to generate a Color map programmatically with custom color-ranges, save it, and insert more colors later?

How do I define a color map programmatically without having to use the Color map editor UI interface, and get the same beautiful result?

I want to be able to define custom ranges in the color map, and save it to a file for re-use.

Can I also programmatically insert colors at specific index locations in an existing colormap?

For example, I want to make a colormap with the following colors at the following indices:

Index : Color
   0  : Blue
  50  : Cyan
 120  : Magenta
 160  : Maroon
 255  : Black

Now, after creating this colormap, I want to insert two more colors into this colormap:

Index : Color
 180  : Grey 
 255  : Pink

How can I do this programmatically, without having to use colormapeditor?

Answer 1

[MathWorks Support Team]

Please find the 3 attached files, that fully describes how to achieve this functionality.

The general idea is to use the "interp1" function to linearly interpolate the RGB values between the given indices.

The 3 files are:

createColorMap.m : This function file is used to generate a Color Map, given a set of indices and RGB colors
insertColorIntoColorMap.m : This function file is used to insert RGB colors at specific indices within an existing colormap
exampleColorMapGeneration.m : This is an example script showing how to utilize these functions for the example given in the question.