Legend does not have the right color every two plots.
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%Every even plot inside the "for" has a mismatch in color(and the mismatches have the same color).
%I'm plotting from simulink. Tried fixing using the vector "cor" inthe plot but didn't help.
clear all
close all
clc
legend('off');
legend('show');
Vref=0.1;
gamma=0.1;
Kd=1:1:6;
Kp=1:1:6;
Ki=1:1:6;
cor=[[1 1 0]; [1 0 1]; [0 1 1]; [1 0 0]; [0 1 0]; [0 0 1]; [0 0 0]]
for i = 1:size(Kd,2)
K_d=Kd(i);
for j= 1:size(Kp,2)
K_p=Kp(j);
info=sim('diagrama_blocos');
Vt_out=info.Vt.signals.values(:,1);
Vt_ref_out=info.Vt.signals.values(:,2);
time_out=info.Vt.time;
plot(time_out,Vt_out,'LineWidth',2,'Color', cor(j,:));grid on;hold all;
line([time_out(1),time_out(end)],[Vref,Vref]);
legendInfo{j}=['Kp= ', num2str(K_p)];
title(['Curvas para Kd= ', num2str(K_d)]);
end
legend(legendInfo)
figure()
end
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采纳的回答
Adam Danz
2020-10-17
"Legend does not have the right color every two plots"
That's because you're adding two lines on each iteration of your loop.
for i = 1:size(Kd,2)
K_d=Kd(i);
for j= 1:size(Kp,2)
K_p=Kp(j);
info=sim('diagrama_blocos');
Vt_out=info.Vt.signals.values(:,1);
Vt_ref_out=info.Vt.signals.values(:,2);
time_out=info.Vt.time;
% LINE 1
plot(time_out,Vt_out,'LineWidth',2,'Color', cor(j,:));grid on;hold all;
% LINE 2
line([time_out(1),time_out(end)],[Vref,Vref]);
legendInfo{j}=['Kp= ', num2str(K_p)];
title(['Curvas para Kd= ', num2str(K_d)]);
end
legend(legendInfo)
figure()
end
Instead of including any and all objects on your legend, and instead of storing a list of legend strings separately from their corresponding objects, use this 2-step method defined in this answer. The result will look something like this (see inline comments for details,
% Don't do this
% clear all
% close all
% clc
% legend('off');
% legend('show');
Vref=0.1;
gamma=0.1;
Kd=1:1:6;
Kp=1:1:6;
Ki=1:1:6;
cor=[[1 1 0]; [1 0 1]; [0 1 1]; [1 0 0]; [0 1 0]; [0 0 1]; [0 0 0]]
for i = 1:size(Kd,2)
K_d=Kd(i);
% Create figure here
figure()
% Set this stuff prior to the j-loop
grid on
hold on
% Preallocate the plot handles
plotHandles = gobjects(1,size(Kp,2));
for j= 1:size(Kp,2)
K_p=Kp(j);
info=sim('diagrama_blocos');
Vt_out=info.Vt.signals.values(:,1);
Vt_ref_out=info.Vt.signals.values(:,2);
time_out=info.Vt.time;
% 1) Store output handles and 2)Define DisplayName propery
plotHandles(j) = plot(time_out,Vt_out,'LineWidth',2,'Color', cor(j,:), ...
'DisplayName', ['Kp= ', num2str(K_p)]);
% Move this out of the j-loop
%grid on;hold all;
line([time_out(1),time_out(end)],[Vref,Vref]);
% No need for this anymore
% legendInfo{j}=['Kp= ', num2str(K_p)];
% Move this outside of the loop
% title(['Curvas para Kd= ', num2str(K_d)]);
end
% Set title
title(['Curvas para Kd= ', num2str(K_d)]);
% Call legend with list of handles
legend(plotHandles)
% Move this to before the j-loop
% figure()
end
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