[R] Heatmap, and heatmap.2 gave different figures for the same dataset

[capricy gao]

I have a huge dataset(15k X 18) and tried to use the heatmap in R to examine the patterns. However, I found that heatmap and heatmap.2 gave me completely different outputs.

Here are the codes:

------------

> dim(as.matrix(data.dcpm))
[1] 15462    18
> 
> heatmap(as.matrix(data.dcpm), col=topo.colors(100))
> heatmap.2(as.matrix(data.dcpm), col=topo.colors(100), key=TRUE, density.inf="none",trace="none", scale="none")
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The outputs are attached here.

Could anyone help me figure out why?

Thanks a lot:)