Question: gene names disapper from heatmap.2 after adding gene descripton
gravatar for mictadlo
11 days ago by
mictadlo0 wrote:

Hi, after I added gene description to y <- DGEList(counts=rawCountTable, group=group, genes = merged.descriptions) the gene names have replaced by numbers

> logCPM <- cpm(y, prior.count=2, log=TRUE)
> head(y$genes)
   gene_name                                    gene_description
3  sp0000003                                                <NA>
4  sp0000004                                                <NA>
5  sp0000005                                          PUA domain
6  sp0000006 Sugar efflux transporter for intercellular exchange
8  sp0000008                                                <NA>
12 sp0000012                       Ankyrin repeats (many copies)
> y$samples$group
 [1] Root_tip.1.5 Root_tip.1.5 Root_tip.1.5 Root_tip.1.5 Leaves.1.5   Leaves.1.5  
 [7] Leaves.1.5   Leaves.1.5   Root_tip.2   Root_tip.2   Root_tip.2   Root_tip.2  
[13] Leaves.2     Leaves.2     Leaves.2     Leaves.2     Root_tip.3   Root_tip.3  
[19] Root_tip.3   Root_tip.3   Leaves.3     Leaves.3     Leaves.3     Leaves.3    
Levels: Leaves.1.5 Leaves.2 Leaves.3 Root_tip.1.5 Root_tip.2 Root_tip.3
> rownames(logCPM) <- row.names(y$genes$genes)
> colnames(logCPM) <- paste(y$samples$group, 1:2, sep="-")
> o <- order(tr$table$PValue)
> logCPM <- logCPM[o[1:30],]
> logCPM <- t(scale(t(logCPM)))
> library(gplots)
> col.pan <- colorpanel(100, "blue", "white", "red")
> heatmap.2(logCPM, col=col.pan, Rowv=TRUE, scale="none",
+           trace="none", dendrogram="both", cexRow=0.6, cexCol=0.6,"none")

How is it possible to get back the gene names in heatmap.2?

Best wishes,

ADD COMMENTlink modified 10 days ago • written 11 days ago by mictadlo0
gravatar for mictadlo
10 days ago by
mictadlo0 wrote:

I think I found the solution rownames(logCPM) <- as.character(row.names(y)).

ADD COMMENTlink written 10 days ago by mictadlo0

Actually logCPM already had those row names when you created it. Then you removed the row names by

rownames(logCPM) <- row.names(y$genes$genes)

That removes the row names because you don't have any annotation column called "genes".


ADD REPLYlink modified 10 days ago • written 10 days ago by Gordon Smyth32k
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