R help - May 2009 - Plotting questions

Hi,
I am new to R. I have two questions about plotting in R:

1. How to plot several lines in a figure? Suppose I have several sets of
points (xi,yi), where xi and yi are equal-length vector. plot(x1,y1) will
give a line connecting these points. Another plot(x2,y2) will erase what
plot before and plot the new line. Can I have these lines all drawn in the
same figure?

2. How to open another figure window? Repeating plot will redraw in the same
window instead of opening another one.

Thanks and regards!
-Tim
-- 
View this message in context:
http://www.nabble.com/Plotting-questions-tp23442445p23442445.html
Sent from the R help mailing list archive at Nabble.com.

> 1. How to plot several lines in a figure? Suppose I have several sets of
> points (xi,yi), where xi and yi are equal-length vector. plot(x1,y1) 
will
> give a line connecting these points. Another plot(x2,y2) will erase what
> plot before and plot the new line. Can I have these lines all drawn in 
the
> same figure?
#Draw your plot
plot(seq(0,1,length.out=20))

#Add lines to the existing plot
lines(runif(20))

#Add points to the existing plot
points(runif(20), col="red")
> 2. How to open another figure window? Repeating plot will redraw in the 
same
> window instead of opening another one.
On Windows, windows() will open a new figure window; quartz() on Mac OSX 
and x11() on Linux do the same.

Regards,
Richie.

Mathematical Sciences Unit
HSL



------------------------------------------------------------------------
ATTENTION:

This message contains privileged and confidential inform...{{dropped:20}}

>>> lehe <timlee126 at yahoo.com> 08/05/2009 09:58:40
>>>
>1. How to plot several lines in a figure? 
See ?lines
>2. How to open another figure window? 
see ?windows



*******************************************************************
This email and any attachments are confidential. Any use...{{dropped:8}}