[BioC] heatmap.2 how to remove row separator

[Deepayan Sarkar]

2011/2/23 Benoît Ballester <benoit at ebi.ac.uk>:
> Hi James,
>
> James W. MacDonald wrote:
>
>> Then zoom in on the resulting pdf. There will be some small white lines,
>> but IMO they are very unobtrusive.
>
> Indeed this is exactly what I see, and I do find it annoying. Have a look at
> the links below. You'll notice the difference between PDF (with white lines)
> and PNG (I believe without)
>
>
> http://tinyurl.com/6yqcswr
> http://tinyurl.com/67wkbl3
>
>
>
>> Your other choice is to use levelplot() from lattice, but you will still
>> get white lines:
>>
>> library(lattice)
>> pdf("tmp2.pdf", width=5, height=50)
>> levelplot(matrix(rnorm(10000), nrow=10), col=redgreen(100),
>> colorkey=FALSE)
>> dev.off()
>>
>
> This seems to work slightly better.
> I'll give it a try...

One additional (belated) comment: WIth levelplot(), you could also try
the "raster" version (which should work on most devices):

levelplot(matrix(rnorm(10000), nrow=10), colorkey=FALSE, aspect =
"fill", panel = panel.levelplot.raster)

-Deepayan