How can I insert 2 figures in one figure?

Hi! I'm working with radar images and I'm getting the interferogram and the coherence from each pair of images. I want to show the interferogram and the coherence maps in one figure. My figures are as follows:

pcolor(X,Y,interf);
shading flat;
grid on;
axis equal;
xlim([xmin xmax]);
ylim([ymin ymax]);
xlabel('x [m]');
ylabel('y [m]');

pcolor(X,Y,coh);
shading flat;
grid on;
axis equal;
xlim([xmin xmax]);
ylim([ymin ymax]);
xlabel('x [m]');
ylabel('y [m]');

I have tried using subplot but what I get is a blank figure and the coherence map in a new figure. Can somebody help me with this?

Thanks!

Answer 1

[Chad Greene]

How were you calling subplot? Did you do it like this?

figure
subplot(2,1,1) 
pcolor(X,Y,interf);
shading flat;
grid on;
axis equal;
xlim([xmin xmax]);
ylim([ymin ymax]);
xlabel('x [m]');
ylabel('y [m]');

subplot(2,1,2) 
pcolor(X,Y,coh);
shading flat;
grid on;
axis equal;
xlim([xmin xmax]);
ylim([ymin ymax]);
xlabel('x [m]');
ylabel('y [m]');

[Chad Greene]

Also a helpful trick. These three lines:

axis equal;
xlim([xmin xmax]);
ylim([ymin ymax]);

can be replaced by

axis equal 
axis tight

You can even combine the axis commands into one line:

axis equal tight

And it just so happens there's a command that's even shorter:

axis image

[Agustin]

Thank you so much! This was very helpful.

Answer 2

[Cong Ba]

Hi Agustin,

It seems like you want to have 2 separately plots on one figure - and if this is the case, subplot should serve your purpose well.

You may use something like:

figure;
subplot 121;
# plot your stuff here in the 1st subplot
subplot 122;
# plot the other one

Or, if you have tried this and it didn't work, there may be bugs. Then could you upload the code you are using to plot?

[Agustin]

Thank you so much! I do have a question. One of the plots needs a colorbar. When I insert the colorbar, one plot looks smaller than the other one. How can I adjust the figure so both plots look the same size on the figure?

[Chad Greene]

Agustin, in cases like this you'll usually have better luck starting a new question because a lot of folks on the forum only check the questions that don't have any answers yet. But I think I can answer your question.

There are a couple of ways you can go about this. One way is to put the colorbar inside the axis limits by specifying the location as 'north', 'south', 'east', or 'west'. Like this:

figure 
subplot(1,2,1) 
imagesc(peaks) 

subplot(1,2,2) 
imagesc(peaks) 

colorbar('north')

Or you can set the position of the axes manually like this:

figure 
subplot(1,2,1) 
imagesc(peaks) 

subplot(1,2,2) 
imagesc(peaks) 

% get axis position: 
axpos = get(gca,'pos'); 

% Call a colorbar: 
cb = colorbar; 

% reset axis position:
set(gca,'pos',axpos)

[Agustin]

Thanks!

[Agustin]

The second method worked exactly as I wanted. Thank you so much!