legend has same colors

Question

fadams18 2020-2-17

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/505949-legend-has-same-colors

评论： Adam Danz 2020-2-18

Its been asked many times but my code looks fine. I dont know whats making matlab show same colors on the legend

figure(1),
semilogy([1:101],rRE_NeNMF_V','b'),
hold on
semilogy([1:101],rRE_NeNMF_GC','r'),
hold on
semilogy([1:101],rRE_NeNMF_GC_RE','g'),
hold on
semilogy([1:101],rRE_NeNMF_RSI','y'),
axis([0 101 1e-10 1.01])
legend('vanilla','GC','GCRE','RSI')
xlabel('Iterations')
ylabel('RRE')
title('plts of solvers')

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Answer 1

Adam Danz 2020-2-17

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/505949-legend-has-same-colors#answer_415988

编辑：Adam Danz 2020-2-18

在 MATLAB Online 中打开

Use the function outputs to get the line object handles. Then, use the object handles in legend().

sem1 = semilogy([1:101],rRE_NeNMF_V','b');
hold on
sem2 = semilogy([1:101],rRE_NeNMF_GC','r');
sem3 = semilogy([1:101],rRE_NeNMF_GC_RE','g');
sem4 = semilogy([1:101],rRE_NeNMF_RSI','y');
axis([0 101 1e-10 1.01])
legend([sem1(1),sem2(1),sem3(1),sem4(1)],'vanilla','GC','GCRE','RSI') 