plotting question

Hi,

Trying to print out two vectors of data in a plot.  Both are
actual time series but I've been unable to plot both in one
graph.  Some examples available use use matrix() or ts() as
an intermediate way to build an object that can be plotted
but I've had no luck.

Can someone point me to an example or cut and paste one
I can look at?  I'd like to be able to plot them in different
colours as I've done with the ts.plot function with output
from STL.

Thanks.

Ed