[R] Adding Scale to image

[Peter Robinson]

Dear List,

I have used the image() function to show a heat plot of a matrix of data 
whose intensity  is color-coded. I have two questions that I have not 
been able to solve by using the help system or google.

1) How can one add a scale/legend that shows what numerical values a 
given color corresponds to?
2) How can one "flip" the rows (i.e., change the order of the rows in 
the image plot)?

Thanks very much in advance, Peter

-- 
Dr. med. Peter N. Robinson, MSc.
Institut für Medizinische Genetik
Universitätsklinikum Charite
Humboldt-Universität
Augustenburger Platz 1
13353 Berlin
Germany
voice: 49-30-450569124
fax:   49-30-450569915
email: peter.robinson at charite.de
http://www.charite.de/ch/medgen/robinson