Cannot resize rowlabels in aheatmap

Question

[shaden]

Hi, I am drawing a heatmap for the top 50 DEgenes in my matrix using this code:

aheatmap(highly_variable_lcpm,col=rev(morecols(50)),main="Top 50 most variable genes",annCol=metadata[, 2:3],labCol=metadata$`sample name`, 
         scale="row", width = 5, height = 10, cexRow = 5)

I am having difficulty resizing the gene names, they are very small barely readable. I have tried using only 30 genes but they are still small. resetting the cexRow to new values does not seem to change anything at all. I have also tried what is suggested elsewhere:(width = 5, height = 10) but it also changes nothing!

Is there another way to make labels larger?

Thanks!

[Ridha]

I have never used aheatmap, but looking to the documentation, it seems that it's just like pheatmap. If your gene names are in the rows, I think playing with fontsize_row would help making the labels larger if I understood you correctly.

[shaden]

Hi, unfortunately it's not like pheatmap

fontsize_row is not an argument in aheatmap

[Santosh Anand]

Did you try to set the fontsize_row to some bugger value? `

[shaden]

Hi, fontsize_row is not an argument in aheatmap

"unused argument (fontsize_row = 5)"

[Santosh Anand]

Ok, seems like there are different packages for aheatmap and you are using aheatmap from NMF pkg

https://rdrr.io/github/nickytong/GenAnalysis/man/aheatmap.html

If yes, then the documentation says

fontsize base fontsize for the plot

cexRow fontsize for the rownames, specified as a fraction of argument fontsize.

cexCol fontsize for the colnames, specified as a fraction of argument fontsize.

So you first need to set a bigger fontsize and then set cexRow as a fraction of the fontsize set earlier

[shaden]

Yeah I have read this but what does it mean " set cexRow as a fraction of the fontsize set earlier"? I have tried (fontsize = 9, cexRow = 8) for example. The fontsize changes the outside stuff (title for example) , ceXRow does not affect anything all values look the same.

[Santosh Anand]

try the value of cexRow between 0 and 1, and play with fontsize value (try 2-3 higher values)