Strange behavior with subplot command: plots only the last plot

I'm trying to plot subplots, but the command only produces a single plot (the very last one) in a single figure window. I've run code for subplots that was previously working fine only to have the same problem.

To troubleshoot, I also ran the code on Matlab's documentation page for subplot (below), and again it produces just a single plot, the last one, taking up the entire figure. What's going on and is there a way to fix it?

Code from Matlab documentation page:

x = linspace(0,10);
y1 = sin(x);
y2 = sin(5*x);

figure
subplot(2,1,1);
plot(x,y1)

subplot(2,1,2);
plot(x,y2)

(I use Matlab 2014a on a Mac.)