[R] plotting magnitude

[hadley wickham]

On Dec 18, 2007 2:06 PM,  <dkowalske at umassd.edu> wrote:
> I am plotting fishing vessel positions and want these points to be
> relative in size to the catch at that point.  Is this possible? I am just
> begining to use R and my search of the help section didnt help in this
> area.  Heres what Im using so far
>
> xyplot(data$latdeg~data$londeg |vessek , groups=vessek,
> xlim=rev(range(69:77)),ylim=(range(35:42)), data=data,
>         main=list ("Mackerel catches", cex=1.0),
>                 ylab="latitude", notch=T, varwidth=T,
>                 xlab="longitude", cex.axis=0.5,)
> any info would be appreciated

This is pretty easy to do with the ggplot2 package:

library(ggplot2)
qplot(longdeg, latdeg, data = data, facets = . ~ vessek, size = catch)

or maybe
qplot(longdeg, latdeg, data = data, facets = . ~ vessek, size = catch)
+ scale_area()

if you want the area of the points proportional to the catch, rather
than their radius

Hadley

-- 
http://had.co.nz/