Recodes a numeric vector, character vector, or factor
according to simple recode specifications. Recode
is an alias for recode that avoids name clashes
with packages, such as Hmisc, that have a recode function.
character string of recode specifications:
see below.
as.factor.result
return a factor; default is TRUE if
var is a factor, FALSE otherwise.
as.numeric.result
if TRUE (the default), and as.factor.result is FALSE,
then the result will be coerced to numeric
if all values in the result are numerals---i.e., represent numbers.
levels
an optional argument specifying the order of the
levels in the returned factor; the default is to use the sort order
of the level names.
...
arguments to be passed to recode.
Value
a recoded vector of the same length as var.
Details
Recode specifications appear in a character string, separated by
semicolons (see the examples below), of the form input=output.
If an input value satisfies more than one specification,
then the first (from left to right) applies.
If no specification is satisfied, then the input value is carried
over to the result. NA is allowed on input and output.
Several recode specifications are supported:
[object Object],[object Object],[object Object],[object Object]
If all of the output values are numeric, and if as.factor.result is
FALSE, then a numeric result is returned; if var is a factor,
then by default so is the result.
References
Fox, J. and Weisberg, S. (2011)
An R Companion to Applied Regression, Second Edition, Sage.
x<-rep(1:3,3)
x
## [1] 1 2 3 1 2 3 1 2 3recode(x, "c(1,2)='A';
else='B'")
## [1] "A" "A" "B" "A" "A" "B" "A" "A" "B"Recode(x, "1:2='A'; 3='B'")
## [1] "A" "A" "B" "A" "A" "B" "A" "A" "B"