I think that you are correct. R has the annoying habit of converting
character data to factors when you don't want it to while it is importing data.
This is because the in the option "stringsAsFactors" is set to TRUE for some
weird historical reasons.
Try the command str(insert name of data) and see what happens. It should show
you which columns of data are being treated as factors.
You can convert the back to character or to numeric. See the FAQ Part 7 "How
do I convert factors to numeric? " or you can use the String as options command
in the read.table to FALSE
Something like this should work, I think, but it's not tested
read.table("C:/rdata/trees.csv", stringsAsFactors=FALSE)
--- On Mon, 5/3/10, vincent.deluard <vincent.delu...@trimtabs.com> wrote:
> From: vincent.deluard <vincent.delu...@trimtabs.com>
> Subject: Re: [R] / Operator not meaningful for factors
> To: r-help@r-project.org
> Received: Monday, May 3, 2010, 6:22 PM
>
> Hi there,
>
> This will sound very stupid because I just started using R
> but I see you had
> similar problems.
>
> I just loaded a very large dataset (2950*6602) from csv
> into R. The format
> is ticker=row, date=column.
> Every time I want to compute basic operations, R returns
> "In Ops.factor: not
> meaningful for factors"
>
> I believe it is because R does not read the data as numbers
> but I am not
> sure. Can anybody help?
>
> Thanks!
> --
> View this message in context:
> http://r.789695.n4.nabble.com/Operator-not-meaningful-for-factors-tp791563p2124697.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
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