R help - Sep 2007 - Question on graphs and simple if statements

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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The answer to your first question is

curve(ifelse((x>-1)&(x<1),x^2+1,x+2),from=-10,to=10)

Sorry I cannot understand the next part of your query.

Ross Darnell

On Sun, 2007-09-02 at 00:31 -0700, JHawk3 wrote:
> 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.
>