[R] Dealing with missing values in HeatMap generation
Himanshu.Ardawatia at bccs.uib.no
Fri Apr 7 17:01:35 CEST 2006
I want to generate a heatmap for my data (in a matrix). However, the
data has some missing values (represented as blank).
I get the following errors (with the blanks and with blanks replaced by
NA and including the option rm.na = TURE):
> filename = "input_heatmap.txt"
> g <- as.matrix(filedata)
> fg <- rainbow(nrow(g), start=0, end=.3)
> gg <- rainbow(ncol(g), start=0, end=.3)
> hg <- heatmap(g, col = cm.colors(256), scale="column",na.rm = TRUE,
+ RowSideColors = fg, ColSideColors = gg, margin=c(5,10),
+ xlab = "Average per Species", ylab= "Pathways",
+ main = "heatmap(<Ka/Ks Average Data per Species>, ..., scale =
Error in heatmap(g, col = cm.colors(256), scale = "column", na.rm = TRUE, :
'x' must be a numeric matrix
Is there anyway to deal with it?
Second question: What is the basis for generation of the dendrogram
(over the heatmap) in the heatmap? Is it simple hierarchical clustering?
Thanks in advance
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