[R] adjusting levelplot color scale to data
lannajin at gmail.com
Mon Nov 7 04:08:44 CET 2011
I have a matrix with values varying from approximately -0.7 to 0.33 that I
want to create a heatmap/levelplot with.
When I execute the levelplot function for my matrix, I end up getting colors
that are adjusted to the max and min rather than around 0. In other words,
ideally I would like to have a color ramp that goes from red (negative
number), to white (0), to blue (positive); however, right now the value 0 is
in the blue.
Any insight on how to address this problem?
Thanks in advance!
my matrix "y" looks something like this
A B C
row1 -0.5046406 -0.021579587 -0.4419101 -0.2999195330
row2 -0.3070091 -0.059065936 0.3329806 -0.0519335420
row3 -0.7271707 0.073282855 -0.3181990 -0.2485017700
row4 0.3329806 -0.017762750 -0.1513197 -0.1016354970
levelplot(y) yields a color scale from red (-0.8 to 0.2) to blue (0.2 to
I'd want the color scale to be from red (-0.8 to 0) to blue (0 to 0.4)
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