Plotting
can plot using two methods. The first is to use the plplot
library. The other is to use the freely available gnuplot
plotting program. The way your was built determines whether
you can use neither, just one, or both methods.
gnuplot can produce output on many different
display types and file formats, though the quality of the plotting
varies according to the capabilities of the output device. plplot does
not have the same range of output options, however it has much better
support under .
Subsections