[R] modify rectangle color from image

Saurav Pathak saurav at sas.upenn.edu
Wed Jan 24 22:37:20 CET 2007


I need some suggestion on how I could modify the color on some
rectangle that I have created using "image".

In other words, I have a 5x5 matrix, say, m.  

        m <- matrix(rnorm(25), nrow=5)

I create a grid of rectangles by:


Now I want to change the color of rectangle (3,3) to blue. 

I don't know how this could be done, and searching the web has given
me no hint.  

Thanks for your help.


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