It is certainly possible, and likely straightforward. It would help if you are a bit clearer on what you want.
Does your plot go from 400 to 1100 on the y-scale, and you only want data in the range of 400 to 800 to have colored markers?
Is it 2D or 3D?
See if this does what you want:
x = 1:50;
y = randi([400 1100], 1, 50);
select = (y >= 400) & (y <= 800);
figure(1)
plot(x(~select), y(~select), 'pk')
hold on
plot(x(select), y(select), 'pg', 'MarkerFaceColor','g')
hold off
The ‘select’ assignment is a logical vector with 1 or true corresponding to the y-values that meet the criteria, and 0 or false for the others. The tilde ‘~’ here operates as a negation operator, turning the 1 values to 0 and 0 to 1. It makes the code much easier to write.
