On Jul 29, 2011, at 6:38 PM, Sumukh Sathnur wrote:
Hi all,
I used image.plot() to create a heat map of a matrix:
as.matrix(read.table("Matrix.txt", sep="\t"))->x
HeatBrk<-seq(5,25,2.5)
MyCol= gray((7:0)/7)
library(fields)
image.plot(x, col=MyCol, breaks=HeatBrk, legend.shrink=0.3)
dev.copy(device=pdf, file="HEAT4!.pdf", height=8, width=8)
dev.off()
There are a few things that I would like to do that I can't seem to
find help with online:
1) Add axes to the bottom and left that go from 1:ncol(x) ; in this
case, 104. Every time I try to add axes in some form or another they
either go through the center of the image or do not show up at all.
2) Limit the scale of the legend from the minimum value to the
maximum value that I assign a color to; as of now it goes from the
minimum value (0) to the maximum value (300) but I would like it to
stop at 25.
3) Rotate the resulting image 90 degrees to the right. Is there a
generic way to do this? everything I have found online is case-
specific and extremely complicated...
I don't have time to address the complte set of questions but wouldn't
this last one be easily handled by reversing the x and y arguments to
image.plot?
-- David.
I know this is a lot to ask, but I've been stuck on these for a few
days and I can't seem to figure them out. Any help would be
appreciated.
Thanks in advance,
Sumukh
<HEAT4!.pdf><Matrix.txt>______________________________________________
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David Winsemius, MD
West Hartford, CT
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
