How to merge two plots into one

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Perturabo
Perturabo 2019-4-24
编辑： Adam Danz 2019-4-30
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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采纳的回答

Adam Danz
Adam Danz 2019-4-24
编辑：Adam Danz 2019-4-24
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
Perturabo 2019-4-30
编辑：Perturabo 2019-4-30
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
Adam Danz 2019-4-30
编辑：Adam Danz 2019-4-30
Some pointers
  1. get(p1) in your example lists all properties of the line, not the axes.
  2. to list properties of an axes, you need to get the axis handle. See the code below.
  3. "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;
And here's a description of all axes properties
https://www.mathworks.com/help/matlab/ref/matlab.graphics.axis.axes-properties.html

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