Probably the simplest thing there is, but I can't get it to work:
Example for my data:
a <- c(1,1,1,2,2,2,3,3,3)
b <- c(1,2,3,1,2,3,1,2,3)
c <- c(1,2,3,4,5,6,7,8,9)
df <- data.frame(cbind(a,b,c))
I create a heat map with c being the values:
ggplot(df, aes(df$a, df$b, fill = df$c)) + geom_raster()
problem:
The color coding is automatically a gradient. However, I would like to color in
4 fixed colors dependent on the value in c. For example:
if c<=2 color "darkblue"
if 2<c<=3 color "blue"
if 3<c<=5 color "lightblue"
if c>5 color "white"
In addition I would like to show a legend that illustrates this color coding.
It must be very easy, but I just can't figure it out. Only find commands that
make gradients...
Thanks a lot in advance!
______________________________________________
Dr. Nina C. Hubner
scientist quantitative proteomics
Department of Molecular Biology, Radboud University Nijmegen, The Netherlands
e-mail: n.hub...@ncmls.ru.nl
tel: +31-24-3613655
Visiting address:
Department of Molecular Biology, RIMLS, 2nd floor
Geert Grooteplein 26/28
6525 GA Nijmegen
The Netherlands
The Radboud University Medical Centre is listed in the Commercial Register of
the Chamber of Commerce under file number 41055629.
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
