ec.Recode: DataFrame Tools : Recode the content of a column
In Epiconcept-Paris/Epiconcepts: Tools for epidemiologists

Description Usage Arguments Details Value Author(s) Examples

Recode the content of a column (variable) of GDS. GDS is the Global DataSet.

1	ec.Recode(x, where, by, gen = "")

`x`	- a string value, the name of the column to be recoded
`where`	- a list of logical expressions
`by`	- a list of values matching the list of logical expressions. Originals values will be replaced by these
`gen`	- optional string, the name of the new column

TODO

Return nothing. GDS the Global DataSet is modified

jp.decorps@epiconcept.fr

# -----------------------------------------------------------
# Recode the 'carb' column with 0 if carb is lower than 3
# and with 1 if 'carb' higher or equal than 3
# -----------------------------------------------------------
data(mtcars)
ec.Use(mtcars);
str(GDS)
ec.Recode("carb", where = list(VAL("carb") < 3, VAL("carb") >= 3), by=list(0,1))
str(GDS)

# -----------------------------------------------------------
# Create a new column (variable) named 'carGroup' which contains the
# recoding of the 'carb' column. The 'carb' column is not modified.
# -----------------------------------------------------------
data(mtcars)
ec.Use(mtcars);
str(GDS)
ec.Recode("carb", where = list(VAL("carb") < 3, VAL("carb") >= 3), by=list(0,1), gen="carbGroup")
str(GDS)