
Hi,
eset is an expressionset based on hgu133plus2 platform. 

Using hgu133plus2.db package, I want to map probes to UniGene cluster IDs. 
It results in an error message.

>xx=hgu133plus2UNIGENE
>uniaf1=xx[[as.character(featureNames(eset))]]
Error in .checkKeys(value, Lkeys(x), x@ifnotfound) : 
  value for "AFFX-r2-Hs18SrRNA-3_s_at" not found

Could you please help me figure out what creates the error ?

Many thanks

Vickie


 		 	   		  
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