[R] heatmap with RNA-Seq data

[rebioman]

Hi all,
new to this forum
I'm try to using R to draw a heatmap of my RNA-seq data
before doing that I did a log2 transformation of my data and produce a lot
-inf in the matrix 
when I try to use the heatmap function, it seems can not deal with the -inf
so I was wondering how to deal with these gene with 0rpkm(they are not 0 in
all samples, so I want to keep them in the heatmap)
thanks

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