Matlab subplot function not working

Question

I have been trying to use the subplot function in Matlab, using the following code:

x = 0:10;
figure
subplot(2,2,1); plot(x,data_matrix(1,:))
subplot(2,2,2); plot(x,data_matrix(2,:))
subplot(2,2,3); plot(x,data_matrix(3,:))
subplot(2,2,4); plot(x,data_matrix(4,:))

However, when I run this simple code, the only thing that displays is a single figure with a plot of the last data vector, data_matrix(4,:). No errors show up. Rather, subplots are simply not being generated. Am I doing something incorrectly, or is there a potential error with my programming environment that's keeping me from displaying subplots?

clear everything, and comment out 'figure'. Does that help?

Flynn
– Flynn

2017-06-30 17:53:38 +00:00
Commented Jun 30, 2017 at 17:53 — Flynn
– Flynn, Commented Jun 30, 2017 at 17:53
No, I still get the same result.

Matthew Brown
– Matthew Brown

2017-06-30 17:57:02 +00:00
Commented Jun 30, 2017 at 17:57 — Matthew Brown
– Matthew Brown, Commented Jun 30, 2017 at 17:57
Transpose matrices likes data_matrix(1,:).'.

OmG
– OmG

2017-06-30 17:57:59 +00:00
Commented Jun 30, 2017 at 17:57 — OmG
– OmG, Commented Jun 30, 2017 at 17:57
I just tried that, and it also doesn't work.

Matthew Brown
– Matthew Brown

2017-06-30 18:05:06 +00:00
Commented Jun 30, 2017 at 18:05 — Matthew Brown
– Matthew Brown, Commented Jun 30, 2017 at 18:05
Restart matlab?

Flynn
– Flynn

2017-06-30 18:06:02 +00:00
Commented Jun 30, 2017 at 18:06 — Flynn
– Flynn, Commented Jun 30, 2017 at 18:06

mrbolichi · Accepted Answer · 2017-06-30 18:00:16Z

1

Are you sure data_matrix(1,:) contains what you expect? You might want to check that out. Also, it'd great if you provided the minimal piece of code that reproduce your problem. Provided piece doesn't reproduce the problem because you don't provide access to data_matrix matrix which I suspect is causing the problem, because running this piece of code

x=0:10;
data_matrix=rand(4,11);

figure
subplot(2,2,1); plot(x,data_matrix(1,:))
subplot(2,2,2); plot(x,data_matrix(2,:))
subplot(2,2,3); plot(x,data_matrix(3,:))
subplot(2,2,4); plot(x,data_matrix(4,:))

works perfectly, as you can see below (I used a rand to recreate a well-formed data_matrix matrix)

answered Jun 30, 2017 at 18:00

mrbolichi

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6 Comments

Matthew Brown Over a year ago

data_matrix is simply a 4 x 11 matrix containing decimals. I have already checked the data to make sure there is nothing wrong with it.

Matthew Brown Over a year ago

When I run the code you provided, using a randomly created data_matrix, I still have the same issue. Only one plot is displayed.

mrbolichi Over a year ago

Which version of matlab are you using? Run ver on matlab's prompt

Matthew Brown Over a year ago

I am running the following version of Matlab: 8.5.0.197613 (R2015a).

mrbolichi Over a year ago

Hmm, that is a modern version so there should not be any problems. Instead of subplot(m,n,p) try subplot mnp and run again your code.

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