[R] looking for a graph command

[Duncan Murdoch]

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