Extracting part of a factor
When I do that, I get "Error in `$<-.data.frame`(`*tmp*`, "site", value = integer(0)) : replacement has 0 rows, data has 6? The data frame has 6 rows. Ken kmnanus at gmail.com 914-450-0816 (tel) 347-730-4813 (fax)
On Mar 3, 2016, at 4:52 PM, Herv? Pag?s <hpages at fredhutch.org> wrote: 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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