[R] Missing values?

[Matej Cepl]

Simple question: I have imported a table from SPSS via read.spss,
but I have not figured out how to tell R that values 8,9 are
considered NA.

After reading help, I thought that something like

is.na(data$P4)<-c(8,9)

would go, but apparently it doesn't (mean gives the same value
without regards to na.rm).

Could anybody help me, please?

Thanks,

	Matej

-- 
Matej Cepl, matej at ceplovi.cz, PGP ID# D96484AC
138 Highland Ave. #10, Somerville, Ma 02143, (617) 623-1488
 
See, when the GOVERNMENT spends money, it creates jobs; whereas
when the money is left in the hands of TAXPAYERS, God only knows
what they do with it. Bake it into pies, probably. Anything to
avoid creating jobs.
    -- Dave Barry

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