[R] heat map labeling

[Angela]

Hello,

I have a dataset of 985 genes, looks something like the ones below. I want to label only those with the high intensities, since labeling all doesn't show up. Is there a way to do that? If not, is there a way to pull out the highest ones (say, highest 50, or those above X amount) and only show those in a heat map? Thanks!

-Angela

Z transforming gives all cells the same value, just + or - (for example, all have 0.5 and -0.5). The researchers want the actual values used.

Gene   var1       var2
A	8000000	0
B	250000	300000
C	750000	2000000
D	0	        0
E	4000000	6000000
E	5000000	700000
E	1000000	1000000
F	6000000	6000000
F	700000	827460
G	420930	400000
H	0	        0
H	1000000	1000000
I	700000	600000
J	0	        700000
K	0	        0
L	200000	500000
L	1000000	3000000