[R] Missing Values from Spss-Data

[C. Schulz]

Hello,
i'm a newbie of the really fantastic "R" , but have some
problems to define Missing Values from Spss-Files which i import
with the read.spss(data) command !

What should i do to recode i.e. the values 9,99 & 999 to NA.
Something like this

x <- c(9,99,999,NA)
x==NA

...do  not what i want, because the data.frame show
the values 9,99 & 999 and not NA in this fields ?

P.S. Perhaps is it easier to define all Missing Values in
SPSS to
SYSMIS so that i have got a blank and R automatically
define's NA to the blanks ???

Best thanks for advance
and regards, christian









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