[R] Flipping a heatmap
David Khabie-Zeitoune
dave at evocapital.com
Thu Sep 11 10:04:19 CEST 2003
Hi
I am using the heatmap function in package mva to look at large
correlation matrices visually.
Is there any way to "flip" the output of heatmap plot left-right so
that, if presented with a correlation matrix, it plots the unity
elements in the correlation matrix along a diagonal from top left to
bottom right?
For example:
library(mva)
x = matrix(rnorm(1000), ncol=10)
z = cor(x)
heatmap(z)
Heatmap calls image, and I've found ways to do it with image e.g:
image(z[1:10,10:1])
will plot things the "right" way round, but
heatmap(z[1:10,10:1])
does not.
Any help much appreciated.
Cheers,
Dave
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