Changing color of plotting points according to number

I'm plotting an error with respect to the number of points used.

Now there are three different ways to comput the error, and I always plot the maximal error.

If the maximum is for computation 1, I want the dot in the plot to be red, for computation 2 it should be blue, etc.

How can I achieve this? My data is in a n x 2 matrix

Answer 1

[Walter Roberson]

Create a small colormap

scatter(x, y, [], INDEX)
caxis([1, size(YourMap, 1)])
colormap(YourMap)