How can I plot subplots on the same size?

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Agustin 2017-9-18

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https://ww2.mathworks.cn/matlabcentral/answers/357199-how-can-i-plot-subplots-on-the-same-size

Hi! I'm trying to plot a figure that can show both the interferogram and coherence of radar images and I did the following:

a = angle(Interferograms(n).Interferogram);
b = Coherence(n).Spatial;
figure;
subplot 221
pcolor(X,Y,a);
shading flat;
grid on;
axis equal;
xlim([xmin xmax]);
ylim([ymin ymax]);
set(gca,'Ydir','normal');
xlabel('x [m]');
ylabel('y [m]');
cb = colorbar;
Number = n;
title(['Interferogram ' num2str(Number)]);
subplot 222
pcolor(X,Y,b);
shading flat;
grid on;
axis equal;
xlim([xmin xmax]);
ylim([ymin ymax]);
set(gca, 'Ydir', 'normal');
xlabel('x [m]');
ylabel('y [m]');
caxis([0 1]);
axpos = get(gca, 'pos');
cb = colorbar;
set(gca,'pos',axpos);
Number = n;
title(['Coherence' num2str(Number)]);

When I plot the figure I get this result:

When I maximize the window, both plots look of the same size. How can I set the the plots to look of the same size without having to click the "maximize" tab on the top right corner?

Thank you!