This might help the first question:
> da <- (-1):1
> x <- data.frame(a1=sample(da,10,TRUE), a2=sample(da,10,TRUE),
a3=sample(da,10,TRUE))> x
a1 a2 a3
1 0 1 0
2 0 0 1
3 0 1 0
4 -1 0 -1
5 1 0 -1
6 1 1 -1
7 1 -1 -1
8 -1 0 0
9 1 1 0
10 0 1 0> is.na(x[1:3]) <- x[1:3] == -1
> x
a1 a2 a3
1 0 1 0
2 0 0 1
3 0 1 0
4 NA 0 NA
5 1 0 NA
6 1 1 NA
7 1 NA NA
8 NA 0 0
9 1 1 0
10 0 1 0>
On Mon, Jun 9, 2008 at 11:18 AM, Michael Pearmain <mpearmain@google.com>
wrote:
> 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
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
>
http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
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