Matlab - Graph and xlabel error

PaulaS

Hello,

I'm new to matlab and I'm still learning the basics.

I was able to plot the graph. However, when I assign the xlabel the graph disappears.

i.e. I write:

x=[1 2 3 4];
y=x.^2;
plot(x,y)

The graph appears. And then when I write:
xlabel('x-axis')

The graph disappears and I only see the x-axis.

Am I missing something?

Thanks a lot