micorarray gene expression data

Question

[bioinfo]

Hi I preprocessed the data using RMA and mapped to the gene symbol but found out repeated gene symbol with different expression values. How to get unique gene symbol??? Thanks

[Devon Ryan]

Which array is this? You have duplicated gene names because many genes have multiple probes (e.g., for different transcripts).

[bioinfo]

So what all steps can i do to get the unique genes?? This is for affymetrix platform.

[Devon Ryan]

Which affymetrix array?

[bioinfo]

The GeneChip Human Genome U133 Plus 2.0 Array

[Devon Ryan]

I think the affy package has a method for that. It's been a few years though...