recode_factor: Recode columns to factor in a data frame.
In stephLH/source.maj: Additional functions to patch a data frame or a vector

Description Usage Arguments Value

The data frame is recoded according to a correspondance table.
The correpondance table contains a least three columns : column, value and factor.
An optional table data_levels contains ordered levels for each column. It contains at least three fields : column, order, level.

1	recode_factor(data, data_recode, data_levels = NULL, new_vars = FALSE)

`data`	A data frame.
`data_recode`	A correspondance table containing between character values and unordered level factors.
`data_levels`	An optional correpondance table between column names and ordered levels.
`new_vars`	If `TRUE` then it computes all variables referenced in data_recode, not only variables in data at the first place.