5 messages · Sarah Goslee, Henrique Dallazuanna, Romain Francois +1 more
Hello, Is this expected ? > nchar( c( "", NA ) ) [1] 0 2 Should not the second one be NA ? Romain
Romain Francois Professional R Enthusiast +33(0) 6 28 91 30 30 http://romainfrancois.blog.free.fr |- http://bit.ly/98Uf7u : Rcpp 0.8.1 |- http://bit.ly/c6YnCi : graph gallery collage `- http://bit.ly/bZ7ltC : inline 0.3.5
Hi Romain,
Did you read the help for nchar?
Value:
For ?nchar?, an integer vector giving the sizes of each element,
currently always ?2? for missing values (for ?NA?).
It may be unexpected behavior, but it's *well-documented* unexpected behavior.
Sarah
On Fri, Jun 18, 2010 at 4:52 PM, Romain Francois
Hello, Is this expected ?
nchar( c( "", NA ) )
[1] 0 2 Should not the second one be NA ? Romain
Sarah Goslee http://www.functionaldiversity.org
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Le 18/06/10 22:58, Sarah Goslee a ?crit :
Hi Romain,
Did you read the help for nchar?
Value:
For ?nchar?, an integer vector giving the sizes of each element,
currently always ?2? for missing values (for ?NA?).
It may be unexpected behavior, but it's *well-documented* unexpected behavior.
Oops. My scan of the help page was too quick. I did not see it. Sorry for the noise.
Sarah On Fri, Jun 18, 2010 at 4:52 PM, Romain Francois <romain at r-enthusiasts.com> wrote:
Hello, Is this expected ?
nchar( c( "", NA ) )
[1] 0 2 Should not the second one be NA ? Romain
Romain Francois Professional R Enthusiast +33(0) 6 28 91 30 30 http://romainfrancois.blog.free.fr |- http://bit.ly/98Uf7u : Rcpp 0.8.1 |- http://bit.ly/c6YnCi : graph gallery collage `- http://bit.ly/bZ7ltC : inline 0.3.5
Value: ? ? For ?nchar?, an integer vector giving the sizes of each element, ? ? currently always ?2? for missing values (for ?NA?). It may be unexpected behavior, but it's *well-documented* unexpected behavior.
Oh, that must make it ok then. For a more sensible take:
library(stringr)
str_length(c("", NA))
[1] 0 NA Hadley
Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/