How to plot two graphs in one subplot?

I would like to plot two graphs in one subplot to compare the parameters of two cars. However, the program does not give the expected outcome. It could only generate one graph in the subplots. How should I correct the program? Thanks!

(I would like to have combined plots similar to the image below.)

Answer 1

[Cris LaPierre]

The same way you would add 2 lines to a plot that is not create using subplot - by either using hold or the following plot syntax:

plot(X1,Y1,...,Xn,Yn)

Visit the interactive tutorial on plotting in Ch 9 of MATLAB Onramp for more.

x=-3:.1:3;
y1 = sin(x*pi/3);
y2 = cos(x*pi/3);

% option 1
plot(x,y1)
hold on
plot(x,y2)
hold off
xlim([-4,4])

% option 2
figure
plot(x,y1,x,y2)
xlim([-4,4])

[Tsz Yan Yeung]

Thanks for your reply! Actually, I would like to first plot six graphs (subplots) in a figure, and then add extra graphs to the subplots, but it turns out that the original graph disappeared. How can I solve this problem? (the program is attacted)

[Cris LaPierre]

More details would be helpful. Otherwise, the answer I gave previously is still true. See the example below.

x=-3:.1:3;
y1 = sin(x*pi/3);
y2 = cos(x*pi/3);

subplot(2,1,1)
plot(x,y1)
xlim([-4,4])

subplot(2,1,2)
plot(x,y1)
xlim([-4,4])

% Add 2nd line to each plot
subplot(2,1,1)
hold on
plot(x,y2)
hold off

subplot(2,1,2)
hold on
plot(x,y2)
hold off

[Tsz Yan Yeung]

Thanks for your answer. However, my program still does not show the expected output. May I ask how can a call a variable from another .m file for plotting graph?

For exmaple, I would like to use the variable "DispLog" with saved value from Electriccar.m script in the plot() function in another script.

[Cris LaPierre]

You call variables from the workspace, not the file. Therefore, any script can create the variable, but it must be in your workspace when you try to plot it. The challenge here is going to be ensuring you design and run both scripts correctly so that it works as intended.

You may also consider saving your variables to a mat file in the first script, then loading them in the second script.