Hi,
Suppose I have a 4 by 4 matrix as following: 10 6 3 1 8 4 3 2 6 2 4 3 9 3 4 2 The x axis is the column index of the matrix, the y axis is the row index of the matrix and the z axis is the value in the corresponding position of the matrix. I tried to use contour and image. They are not the ones I want. You help is greatly appreciated. Peter [[alternative HTML version deleted]] ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html