match() will do what you want. E.g., run your data through
the following function.
f <- function (data)
{
uniqStrings <- unique(c(data[, 2], data[, 3], data[, 4]))
uniqStrings <- setdiff(uniqStrings, "0")
for (j in 2:4) {
data[[j]] <- match(data[[j]], uniqStrings, nomatch = 0L)
}
data
}
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Fri, May 29, 2015 at 9:58 AM, Kate Ignatius <kate.ignat...@gmail.com>
wrote:
> I have a pedigree file as so:
>
> X0001 BYX859 0 0 2 1 BYX859
> X0001 BYX894 0 0 1 1 BYX894
> X0001 BYX862 BYX894 BYX859 2 2 BYX862
> X0001 BYX863 BYX894 BYX859 2 2 BYX863
> X0001 BYX864 BYX894 BYX859 2 2 BYX864
> X0001 BYX865 BYX894 BYX859 2 2 BYX865
>
> And I was hoping to change all unique string values to numbers.
>
> That is:
>
> BYX859 = 1
> BYX894 = 2
> BYX862 = 3
> BYX863 = 4
> BYX864 = 5
> BYX865 = 6
>
> But only in columns 2 - 4. Essentially I would like the data to look like
> this:
>
> X0001 1 0 0 2 1 BYX859
> X0001 2 0 0 1 1 BYX894
> X0001 3 2 1 2 2 BYX862
> X0001 4 2 1 2 2 BYX863
> X0001 5 2 1 2 2 BYX864
> X0001 6 2 1 2 2 BYX865
>
> Is this possible with factors?
>
> Thanks!
>
> K.
>
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