On Nov 6, 2011, at 10:08 PM, Lanna Jin wrote:
Hi guys,
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?
?levelplot # which leads to"
?level.colors # which in turn leads to:
? colorRamp
levelplot(as.matrix(dat), at=seq( -.8, .4, length=31),
col=color.palette(30) )
And next time, please post the output of dput rather than a mangled
print() output.
--
David.
Thanks in advance!
example...
my matrix "y" looks something like this
A B C
D E
row1 -0.5046406 -0.021579587 -0.4419101 -0.2999195330
-0.4845047
row2 -0.3070091 -0.059065936 0.3329806 -0.0519335420
-0.5766368
row3 -0.7271707 0.073282855 -0.3181990 -0.2485017700
-0.5732781
row4 0.3329806 -0.017762750 -0.1513197 -0.1016354970
0.2528442
levelplot(y) yields a color scale from red (-0.8 to 0.2) to blue
(0.2 to
0.4)
I'd want the color scale to be from red (-0.8 to 0) to blue (0 to 0.4)
-----
Lanna
--
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