[R] Missing Data and applying

From: Michael Pearmain <mpearmain_at_google.com>
Date: Mon, 09 Jun 2008 16:18:59 +0100

Hi All,

Newbie question that i'm sure is easy, but i can't seem to apply properly

I read in a datafram from a CSV file and i want to tell R that from coloum "n_0" to "n_32" the value "-1" is missing data i was looking at the
is.na(xx) <- c(..,...,) idea but i can't seem to apply it properly, can anyone offer advice?

On a side issue while i'm asking i have a an XML that i intend to use to add value labels and variable labels to the dataframe (using a python script) but i can't seem to find the syntax for adding value labels? i.e 1=Male 2=Female

the labels command doesn't look like the one i want to use, and i've searched the archives but to no avail (maybe it's a too simple, but i have looked)

Any help willing accepted

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