[R] adjusting R's graphics display

[Faheem Mitha]

Dear People,

I have code that looks like this

 par(mfcol=c(2,1))	
 image(z = as.matrix(val1))
 image(z = as.matrix(val2))

where val1 and val2 are two data frames which are each square arrays of -1
and 1 of side n. The above code displays them as yellow and red squares in
a grid (presumably default colours; whoever made the R default colours
clearly likes red, orange, and yellow) corresponding to -1 and 1. The
graphics display, however, displays these squares in a slightly squashed
fashion along the y axis. I would like the display to be bigger in such a
way that the squares actually look like squares, ie. elongated a suitable
amount in the y direction. What would be nicest way to do this?

Thanks for your time.

                          Sincerely, Faheem Mitha.

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