How to merge two plots into one

Question

Perturabo 2019-4-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/458250-how-to-merge-two-plots-into-one

编辑： Adam Danz 2019-4-30

采纳的回答： Adam Danz

pressure_displacement_profiles.mat

在 MATLAB Online 中打开

I have the following data, related to the given script

% Plot profiles
load pressure_displacement_profiles
% Plot initial -Cp and shape
fig1=figure;
plot(initial.x,-initial.cp,'b-'); hold on;
a = plot(initial.x,initial.disp,'k-');
legend('cp','disp');
get(a)
% Plot optimal -Cp and shape
fig2=figure;
plot(optimal.x,-optimal.cp,'b-'); hold on;
b = plot(optimal.x,optimal.disp,'k-');
legend('cp','disp');
get(b);
% Save to eps
print(fig1,'-depsc2','Hwk1Prob3_starter1');
print(fig2,'-depsc2','Hwk1Prob3_starter2');

How do i show both Optimal and initial plot on the same graph?

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Answer 1

Adam Danz 2019-4-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/458250-how-to-merge-two-plots-into-one#answer_372055

编辑：Adam Danz 2019-4-24

在 MATLAB Online 中打开

To put both axes on the same figure, use subplot()

% Plot initial -Cp and shape
fig1 = figure; 
subplot(2,1,1)
plot(initial.x,-initial.cp,'b-'); 
hold on;
plot(initial.x,initial.disp,'k-');
legend('cp','disp');
% Plot optimal -Cp and shape
subplot(2,1,2)
plot(optimal.x,-optimal.cp,'b-'); 
hold on;
plot(optimal.x,optimal.disp,'k-');
legend('cp','disp');
% Save to eps
print(fig1,'-depsc2','Hwk1Prob3_starter1');

*Not tested

To put all objects on the same axes, use hold on

% Plot initial -Cp and shape
fig1 = figure; 
p1 = plot(initial.x,-initial.cp,'b-'); 
hold on;
p2 = plot(initial.x,initial.disp,'k-');
% Plot optimal -Cp and shape
p3 = plot(optimal.x,-optimal.cp,'b-'); 
p4 = plot(optimal.x,optimal.disp,'k-');
legend([p1,p2,p3,p4], {'cp1','disp1','cp2','disp2'});
% Save to eps
print(fig1,'-depsc2','Hwk1Prob3_starter1');

*not tested

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Perturabo 2019-4-30

编辑：Perturabo 2019-4-30

在 MATLAB Online 中打开

If I use the command

p1 = plot(initial.x,-initial.cp,'b-');
get(p1)

it shows all properties of the plot but axHandle is not one of them. Where do I find these properties which aren't mentioned in the plot itself, such as the properties of axes?

Adam Danz 2019-4-30

编辑：Adam Danz 2019-4-30

在 MATLAB Online 中打开

Some pointers

get(p1) in your example lists all properties of the line, not the axes.
to list properties of an axes, you need to get the axis handle. See the code below.
"axHandle" is just the name I chose for the variable that stores the axis handle.

% Methods of getting axis handle
% 1) If and only if the axes are currently selected
axHandle = gca; 
% 2) get the handle when you create the axes
figure
axHandle = axes; 
% 3) get the handle from the line properties
h = plot(x,y); 
axHandle = h.Parent; 