[R] looking for a graph command

[Martin Sandiford]

Maybe something like this will do what you want:

 > x <- matrix(NA, 5, 5)
 > x[upper.tri(x)] <- runif(10)
 > image(1-t(x)[,ncol(x):1], col=gray.colors(100), axes=FALSE)

Martin

On 18/02/2006, at 5:38 PM, 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 ?
>
> TM.
>
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