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How to change the curves to same colour when using hold on

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Shan Chu
Shan Chu 2016-5-19
回答： Star Strider 2016-5-19
Dear all, I am using a for-loop and hold on to plot a graph. As usual, Matlab automatically change the colour of legends but I want to keep all the legends in the same colour. Could you please help Thanks

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Star Strider
Star Strider 2016-5-19
Specify the colours in each plot call:
figure(1)
plot(x(1,:), y(1,:), '-k')
hold on
for k1 = 2:N
plot(x(k1,:), y(k1,:), '-k')
end
hold off

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