How to change the color of the line in the legend of the figure?

How to change the color of the line in the legend of the figure? I have changed the color of the curves in my figure for several times but the line color did not change correspondingly with them.

Answer 1

[Star Strider]

It would help to have your code and data.

The legend entries correspond to the lines being plotted, and if there are more than one line, this can cause ptoblems.

You may need to speciifically reference each separate plot call.

Example —

x = linspace(0, 1, 1E+3).';
y = sin(2*pi*x*(1:5:25)) + (1:5)

y = 1000×5

1.0000 2.0000 3.0000 4.0000 5.0000 1.0063 2.0377 3.0691 4.1005 5.1317 1.0126 2.0754 3.1379 4.1999 5.2611 1.0189 2.1130 3.2061 4.2973 5.3859 1.0252 2.1504 3.2732 4.3917 5.5041 1.0314 2.1876 3.3391 4.4822 5.6134 1.0377 2.2245 3.4033 4.5678 5.7121 1.0440 2.2611 3.4656 4.6476 5.7984 1.0503 2.2973 3.5256 4.7209 5.8707 1.0566 2.3331 3.5832 4.7868 5.9279

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figure
plot(x, y(:,1:3), 'b')
hold on
plot(x, y(:,4:5), 'r')
hold off
grid
legend('y_1','y_2')                                 % No Specific References

figure
hp1 = plot(x, y(:,1:3), 'b');
hold on
hp2 = plot(x, y(:,4:5), 'r');
hold off
grid
legend([hp1(1) hp2(1)], 'y_1','y_2')                % With Specific References

.