[R] looking for a graph command

[Taka Matzmoto]

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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