Question: the results of logFC is base e (log(FC,base=exp(1)) or base 2 (log2FC) ,is logFC same as log2FC in edgeR?
0
gravatar for ZihaoXing
7 months ago by
ZihaoXing0
ZihaoXing0 wrote:

i found that the fold change of different RNAseq expression analyse resultsĀ  in edgeR is logFC, log2FC is also often used in other analysed ,i want to know if the logFC is same as log2FC in edgeR ,or it is based on exp(1).

limma edger logfc • 210 views
ADD COMMENTlink modified 7 months ago by Gordon Smyth37k • written 7 months ago by ZihaoXing0
Answer: the results of logFC is base e (log(FC,base=exp(1)) or base 2 (log2FC) ,is logFC
1
gravatar for Gordon Smyth
7 months ago by
Gordon Smyth37k
Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
Gordon Smyth37k wrote:

Results reported by edgeR are always log2 so, yes, logFC is the same as log2FC in edgeR.

The use of base2 for log-fold-changes is usual practice in the bioinformatics literature and in most Bioconductor packages.

edgeR uses loge internally, but results are always converted to log2 for reporting.

ADD COMMENTlink modified 7 months ago • written 7 months ago by Gordon Smyth37k

thanks ,i hope it can be changed into log2FC in edgeR in future ,otherwise, it is easy to be confused ,because log default as loge rather than log2 in math.

ADD REPLYlink written 7 months ago by ZihaoXing0
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