[R] how to make a contour plot in R?

Arnau Mir Torres arnau at mnm.uib.es
Mon Mar 13 15:58:26 CET 2006


I am an nxn data frame in the variable frame.
I want to make a contour plot with it. That is, I want to plot a square 
of dimensions [1,n]x[1,n] with the  gray level of square [i,i+1]x[j,j+1] 
equal to frame[i,j].

How can I make it?



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