Legend for multiple plots varying parameters

Question

University Glasgow 2022-9-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1811060-legend-for-multiple-plots-varying-parameters

评论： University Glasgow 2022-9-25

1.png

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
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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.

University Glasgow 2022-9-25

Okay, thank you

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Answer 1

Walter Roberson 2022-9-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1811060-legend-for-multiple-plots-varying-parameters#answer_1060150

% 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')