[R] Half of a heatmap

From: Rosenfeld, Jeffrey <rosenfel_at_cshl.edu>
Date: Sun, 24 Jun 2007 00:14:10 -0400

I am trying to produce a heatmap of pairwise correlations, but since the matrix is symmetric, I only need either the upper or the lower triangle. I have scoured the web and R documentation, but I have not been able to find a way to produce such a figure. Is there a simple way to produce a heat map with only the part above or below the diagonal?

Thank You,

Jeffrey Rosenfeld
Cold Spring Harbor Laboratory

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