Overlaying Multiple Plots

To overlay multiple plots, you can just list them in the same plot command, putting comma's between them. For example:

plot sin(x), x**2/50-1

produces the following:

You can add more complex arguments, or mix functions and data:

plot sin(x) with impulses, x**2/50-1 with boxes
plot "login.dat" with boxes, 250*x-8000

You can overlay as many graphs as you want. In addition to listing all of the commands on the same line, you can use the replot command to add functions. For instance, the first example above could have been like this:

plot sin(x)
replot x**2/50 - 1

You can overlay multiple graphs of any kind, 3D, parametric, etc...

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