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How to make line plot of 3 different colors?

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Zhou Ci
Zhou Ci 2021-7-25
编辑： Zhou Ci 2021-7-25
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.

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Chunru
Chunru 2021-7-25
Ran in:
% 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')

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