[R] Retrieve part of (top right corner) of a "plot.data.frame" plot?

From: Dan Bolser <dan.bolser.r_at_googlemail.com>
Date: Wed, 20 Jun 2007 11:20:44 +0200


Hi,

I believe this question has been asked before, but I cant find and don't remember the answer.

The problem is simple, calling 'plot.data.frame(x)' gives a nice 'matrix of scatterplots' for each pair of columns in x. for example;

x <-

  data.frame(a=jitter(01:20),
             b=jitter(20:01),
             c=jitter(21:40),
             d=jitter(rep(01,20)),
             e=jitter(rep(10,20)),
             f=jitter(rep(20,20))
             )

plot(x)

gives a 6 by 6 grid of scatter plots, two (upper right and lower left) for each pair of columns in x. (I am going over these basics so that you can understand what I mean next).

I would like to see just part of the above result, namely the nine plots in the top right of the given plot, or;

a vs. d | a vs. e | a vs. f
b vs. d | b vs. e | b vs. f
c vs. d | c vs. e | c vs. f

I tried a number of ways to do this, but I can't find either the right formula or the right function to get what I want.

Any suggestions you can give (especially any not involving the source code of 'pairs') are most welcome.

Dan.

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