[R] if function and apply

Gregor Gorjanc gregor.gorjanc at bfro.uni-lj.si
Tue Aug 1 12:20:02 CEST 2006

John Kane <jrkrideau <at> yahoo.ca> writes:
> I have a dataset just imported from SPSS.  It has any
> number of 99's as missing data and it looks like the
> next dataset will have custom missing codes. I have
> abouat 120 variables and an N of 2000.
> #  define function
> fn <- function (x a) {

you need comma between x and a i.e. (x, a)

> if (x==a)return  (b) else x
> }

How can you return b, if b was not defined before


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