any recommendation for software about prediction analysis of gene expression data

Dear R users,

I have a microRNA (similar to microarray) data set with gene expressions and group variables. I'd like to perform (class) prediction analysis to see which genes or gene sets predict the group variable well.

I'm at the beginner level. Is there any free software in R or in point/click format that is commonly used and highly recommended?

I googled this topic and found "SAM" and "PAM" packages for prediction analysis. Am I on the right track?

Thanks!

Dai

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