[R] Question on graphs and simple if statements

[JHawk3]

Hi all,

I'm a relatively new user to the R interface, and am trying to do some basic
operations. So far I've used the curve() command to plot graphs. This has a
couple of limitations, namely trying to do piecewise graphs. Basically, I'm
looking for how to do "if" and "while" loops for making a graph.

in simple code, something like:

if x is on the interval [-1,1], x=x^2+1
otherwise, x=x^2

something along those lines. I also am wondering if it's possible to graph
something like this:
while(n<20)
{
curve(1/n^2, -1,1)
n++
}
Along these same lines, is there a way to graph finite series?

Thank you for your time and your replies.

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