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  • bob-loblaw
    Member
    • Jun 2012
    • 59
    #1

    DESeq2 ntop set to 500?

    Hi all,

    I was just making some PCAs and I noticed that the plotPCA function within DESeq2 only takes the 500 genes with the highest variance. I was wondering if anyone knows what is the justification for this? vs taking the whole dataset? Is it just an attempt to filter out noise?

    I'm working on a mouse RNA-Seq dataset at the moment and the plots look quite different if I take 500 genes vs taking 1000 genes
    Tags: deseq2, pca plot
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