Now that we know something about waves and about about how to plot
data using MATLAB, let us try to visualize a wave in MATLAB.
We said a function of the form *p*=*f*(*x* - *c t*) where *f* is an
arbitrary function represents a forward going wave.

If we look at the function for a speed of *c*=1,
we can plot it for times *t*=0 and *t*=5 as a function of *x* by using
the following MATLAB statements:

**
**

xlist = linspace(-10,10,200);pbegin=exp(-(xlist - 1*0).^ 2);

pend=exp(-(xlist - 1*5).^ 2);

plot(xlist, pbegin, xlist, pend)

xlabel('x')

ylabel('p')

One can clearly see that the wave is a pulse which is moving forward
in the *x* direction.

Tue Feb 25 21:24:33 EST 1997