Legend for multiple plots varying parameters

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University Glasgow
University Glasgow 2022-9-23
评论： University Glasgow 2022-9-25
Pleas, how do I make my legend to match with my data? I have attached the figure. I want the legend data1 to corresponds to xi = -0.06, t=0, data2 to corresponds to xi=-0.05, t=0, data3: xi = -0.06, t=25, data4: xi = -0.05, t=25 and so on ..
% matlab and maple for theta plot for different xi values
figure
subplot(2,1,1)
hold on
for ixi = 1:2
if ixi == 1
plot(z, squeeze(THETA(ixi,it,:)), 'c', z2, thetasolxi,'r');
else
plot(z, squeeze(THETA(ixi,it,:)),'g--', z2, thetasolxi2, 'b--');
end
xlabel('z (\mu m)')
ylabel('\theta(z,t)(rad)')
title('Comparison of \theta(z,t) plot for \xi for maple and matlab' )
end
legend('show')
% matlab and maple for v plot for different xi values
subplot(2,1,2)
hold on
for ixi = 1:2
if ixi == 1
plot(z, squeeze(V(ixi,it,:)), 'c', z2, vsolxi2,'r--');
else
plot(z, squeeze(V(ixi,it,:)),'g', z2, vsolxi, 'b--');
end
xlabel('z (\mu m)')
ylabel('v(z,t)(m/s)')
title('Comparison of v(z,t) plot for \xi for maple and matlab' )
end
legend('show')
  2 个评论
Sharmin Kibria
Sharmin Kibria 2022-9-25
You can try
legend('xi = -0.06, t=0', 'xi=-0.05, t=0', 'xi = -0.06, t=25', 'xi = -0.05, t=25') . The number of character vectors in legend must be equal to the number of data you are plotting. Otherwise it will error out.

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采纳的回答

Walter Roberson
Walter Roberson 2022-9-25
% matlab and maple for theta plot for different xi values
figure
subplot(2,1,1)
hold on
for ixi = 1:2
xi_part = "xi = " + Xis(ixi);
t_part = ", t = " + Times(it);
dn = xi_part + t_part;
if ixi == 1
plot(z, squeeze(THETA(ixi,it,:)), 'c', z2, thetasolxi,'r', 'DisplayName', dn);
else
plot(z, squeeze(THETA(ixi,it,:)),'g--', z2, thetasolxi2, 'b--', 'DisplayName', dn);
end
xlabel('z (\mu m)')
ylabel('\theta(z,t)(rad)')
title('Comparison of \theta(z,t) plot for \xi for maple and matlab' )
end
legend('show')
% matlab and maple for v plot for different xi values
subplot(2,1,2)
hold on
for ixi = 1:2
xi_part = "xi = " + Xis(ixi);
t_part = ", t = " + Times(it);
dn = xi_part + t_part;
if ixi == 1
plot(z, squeeze(V(ixi,it,:)), 'c', z2, vsolxi2,'r--', 'DisplayName', dn);
else
plot(z, squeeze(V(ixi,it,:)),'g', z2, vsolxi, 'b--', 'DisplayName', dn);
end
xlabel('z (\mu m)')
ylabel('v(z,t)(m/s)')
title('Comparison of v(z,t) plot for \xi for maple and matlab' )
end
legend('show')
  5 个评论
显示 3更早的评论
Torsten
Torsten 2022-9-25
编辑：Torsten 2022-9-25
We cannot see where and how you use this
it = 1:round(nt/4):nt
in your plotting part.
As far as I can see, "it" is never set in the code you attached.
University Glasgow
University Glasgow 2022-9-25
Thank you , after the defining the it, Is working now.

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