Re: [R] looking for a graph command

From: Duncan Murdoch <murdoch_at_stats.uwo.ca>
Date: Sun 19 Feb 2006 - 01:09:03 EST

On 2/18/2006 2:08 AM, Taka Matzmoto wrote:
> Hi R users
>
> I am looking for a command or function that draws a graph based on a
> correlation matrix or any lower or upper diagonal matrix.
>
> If I have 5 variables (X1, X2, X3, X4, and X5) there are 10 unique
> correlation values
>
> I like to draw some kind of a gird graph based on these values, using (1,2)
> (1,3), (1,4), (1,5), ...., (4,5) as positions on the graph. If a correlation
> value is closer to 1 then the color for the value is getting black. If a
> correlation value is closer to zero then the color for the value is getting
> white.
>
> Is there any graphic package allowing for doing that ?

library(ellipse)
plotcorr(cor(cbind(X1,X2,X3,X4,X5)))

You can set the colours of the individual entries using the col argument.

Duncan Murdoch



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