How to make line plot of 3 different colors?

Hello everyone,

Is there a way to change colors of line plot different at specific intervals? For example, I want line from 18-0 to be of one color, from 0-(-10) represents different color and -10 till -35 to be of an other color. Thank you.

Answer 1

[Chunru]

% data
x = [2:26 26:-1:-5];
y = [20:-1:-4  -5:-1:-36];

idx1 = y>=0;
idx2 = y>=-10 & y<=0;
idx3 = y<=-10;

plot(x(idx1), y(idx1), 'r-', x(idx2), y(idx2), 'g-', x(idx3), y(idx3), 'b-');
set(gca, 'YDir', 'reverse')