Hi there,

It may works:
df$myvar<-as.numeric(as.character(df$myvar))
bests

milton
brazil=toronto


On Thu, Jun 11, 2009 at 7:37 PM, Payam Minoofar <payam.minoofar@meissner.com
> wrote:

> I have encountered a more fundamental problem in my data set. I'm using
> read.csv, and all the data are imported as character. How do I do a string
> comparison in a line like this:
>
> M10[ !sapply(1:10, function(x)666 %in% M10[x,]), ]
>
> Alternately, how do I change the class type on a column in a data frame
> from character to numeric?
>
> Thank you very much.
>
> Payam
>
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>
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