[R] Plotting questions

[Richard.Cotton at hsl.gov.uk]

> 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



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