How to change the color of a graph only in a particular section?

Question

I was just wondering if there is a way to change a particular part of a plot to another color? Suppose we have a plotted signal in BLUE and we wannan show the main response (let's say with the highest amplitude) in RED.

Prashant Kumar · Accepted Answer

You can draw different lines.
 
t = 0: 0.02: 4 * pi;
y = sin (t);
index = (y >= 0);
plot(t, y, 'b');
plot(t(index), y(index), 'r');

How to change the color of a graph only in a particular section?

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