[R] Extracting part of a factor

[Hervé Pagès]

Hi,

On 03/03/2016 12:18 PM, KMNanus wrote:
> I have a factor variable that is 6 digits and hyphenated.  For example, 001-014.
>
> I need to extract the first 3 digits to a new variable using mutate in dplyr - in this case 001 - but can’t find a function to do it.
>
> substr will do this for character strings, but I need the variable to remain as a factor.

What prevents you from calling as.factor() on the result to turn it
back into a factor?

H.

>
> Is there an R function  or workaround to do this?
>
>
> Ken
> kmnanus at gmail.com
> 914-450-0816 (tel)
> 347-730-4813 (fax)
>
>
>
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-- 
Hervé Pagès

Program in Computational Biology
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