factorize function

Attempt to convert grouping variables to factors

If variables within a data frame are not factors, try to convert them. Not intended for end-user use; this is a utility function that needs to be exported, for technical reasons.

factorize(x,frloc,char.only=FALSE)

Arguments

• x: a formula
• frloc: a data frame
• char.only: (logical) convert only character variables to factors?

Returns

a copy of the data frame with factors converted