How is fold difference calculated?

[laijen000]

Hello,

Thank you for this tool! For the R version, I was wondering if fold difference is "sample 2 / sample 1" or "sample 1/ sample 2"?

Thank you

[rpolicastro]

The comparison is $log_{2}(\text{Sample 2}) - log_{2}(\text{Sample 1})$.

Bob

[Yunuuuu]

The concept of risk ratio