CODEWITHSUNDEEP
rmath
Iarwain
Iarwain

Reputation: 199

Negative log10 transformation in R

I have a vector of p-values I want to perform a -log10 transformation on. I'm aware of functions like log2 and log10 but can't seem to find anything on performing a negative log transformation. What I have found is not working. This is my current code:

x <- -log(dataTable$Pvalues, base = 10)

When executed, this gives me a vector with both numeric and infinite (Inf) values.

How can I correctly perform a transformation with -log10 without getting infinite values?

Upvotes: 0

Views: 2189

Answers (1)

jay.sf
jay.sf

Reputation: 72984

Don't know your data, but you could do something like this:

library(dplyr)
dataTable.1 <- dataTable %>%
  filter(Pvalues != 0)

x <- -log(dataTable.1$Pvalues, base = 10)

Upvotes: 1

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