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...dimensions of z are not length(x)(+1) times length(y)(+1) I also tried using , heatmap.2(z,Colv=NULL,dendrogram="row",col=redgreen(75)) for which i am getting the output, but the columns are reordered. How can this be done for the way in which i want the map to appear? Thanks, svakki.

List, Is it possible to add a color legend to a heatmap , similar to the one in levelplot and filled.contour plot. The legend will represent the colors used in the heatmap along with values for each color range. Can this be done? Please help. Thanks, Svakki.