Question: How different is rlog transformation from vst transformation in DESeq2
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gravatar for piyushjo
26 days ago by
piyushjo50
piyushjo50 wrote:

Hi, I am trying to normalize RNA-Seq using DESeq2. I went on their website and they have three different transformations out of which I tried vst (variance stabilization transformation) and rlog. The thing is that if I have only sample per condition so vst didn't work in those cases but rlog did. Could someone explain me how different they really are? They show the graph on the guide page, and I can see that the lower values in rlog are different than the vst, but the higher count values are not much different. I want to use the normalized data to do WGCNA, where they mention using vst data. I want to know if rlog is similar scale?

Thanks!

deseq2 count normalization • 150 views
ADD COMMENTlink modified 25 days ago by Charles Warden5.4k • written 26 days ago by piyushjo50
1

Did you read this one already: Question: Is there a conceptual difference between vst/rlog transforms and lfcShrink??

ADD REPLYlink written 26 days ago by ATpoint8.0k

In my understanding, vst takes two things into account while normalization, one is size factor(depth normalization) and another is mean dispersion across the sample. while rld only accounts for size factor.

ADD REPLYlink written 26 days ago by prakash510
2
gravatar for Charles Warden
25 days ago by
Charles Warden5.4k
Duarte, CA
Charles Warden5.4k wrote:

I think rnaseqGene has a very nice DESeq2-centric tutorial with a helpful visualization and explanation.

At least for me, this difference wasn't as clear from reading the papers, but the VST normalized counts in that figure look more like thresholded counts.

ADD COMMENTlink written 25 days ago by Charles Warden5.4k
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