Dear List,

I am attempting to visualize some affymetrix data from the hgu133a2.db chip
using heatmap. So far, what I've done is as follows

dat<-ReadAffy(filenames = "GSM448823.CEL", "GSM448824.CEL","GSM448816.CEL",
"GSM448817.CEL")  #puts .CEL files into a data frame

dat2<-rma(dat)          #normalizes data

dat.n<-exprs(dat2)


What I would like to do next is for a subset of gene symbols, ~ 10, I would
like to make a heatmap and display the gene symbols instead of the probe
ids.

So, I need to first get gene symbols from the probe ids and then select only
a subset of these symbols from "dat.n" and make a heatmap of these symbols.

Can anyone help me regarding this problem?

Thanks

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