R: Not meaningful for factors even though its data type is numeric

I'm trying to filter by a column which has a "numeric" type already, but it keeps telling me its not meaningful to compare it using ">".

Answer

We can convert those factor columns to numeric

library(dplyr)
library(magrittr)

mydata %<>%
    mutate_if(is.factor, funs(as.numeric(as.character(.))))

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Or using base R

i1 <- sapply(mydata, is.factor)
mydata[i1] <- lapply(mydata[i1], function(x) as.numeric(as.character(x)))

and then the code should work