bie@ve@idozom@ m@iii@g oii gm@ii@com
2019-Apr-09 11:15 UTC
[R] Convert a character to numeric
Hi,? I am applyin function as.numeric to a vector having many values as NA? and it is giving :? Warning message:? NAs introduced by coercion? Can anyone help me to know how to remove this warning and sor it out?? Thanks? Bienvenue [[alternative HTML version deleted]]
Hi Bienvenue,
Perhaps you should ask whether you really want to "sort it out". The
warning is telling you that you are converting the NA values to NA in
the returned numeric vector. I can't think of anything more sensible
to do with NA values. You may also have character strings that cannot
be converted into numbers, which will also generate NA values. Maybe a
little example will help us to understand:
charstr<-c("5","foot","2",NA,"eyes","of","blue")
as.numeric(charstr)
[1] 5 NA 2 NA NA NA NA
Jim
On Tue, Apr 9, 2019 at 9:16 PM bienvenidozoma at gmail.com
<bienvenidozoma at gmail.com> wrote:>
> Hi,
>
> I am applyin function as.numeric to a vector having many values as NA
> and it is giving :
> Warning message:
> NAs introduced by coercion
>
> Can anyone help me to know how to remove this warning and sor it out?
>
> Thanks
> Bienvenue
> [[alternative HTML version deleted]]
>
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
On 09/04/2019 7:30 a.m., Jim Lemon wrote:> Hi Bienvenue, > Perhaps you should ask whether you really want to "sort it out". The > warning is telling you that you are converting the NA values to NA in > the returned numeric vector.I don't think that's what it is saying. I think it is saying that a non-NA value is being converted to NA, because R can't figure out what number it is. For example, > as.numeric(c("1", NA)) [1] 1 NA > as.numeric(c("1", NA, "one")) [1] 1 NA NA Warning message: NAs introduced by coercion I can't think of anything more sensible> to do with NA values. You may also have character strings that cannot > be converted into numbers, which will also generate NA values.I think that's the only way that message will appear. Duncan Murdoch Maybe a> little example will help us to understand: > > charstr<-c("5","foot","2",NA,"eyes","of","blue") > as.numeric(charstr) > [1] 5 NA 2 NA NA NA NA > > Jim > > On Tue, Apr 9, 2019 at 9:16 PM bienvenidozoma at gmail.com > <bienvenidozoma at gmail.com> wrote: >> >> Hi, >> >> I am applyin function as.numeric to a vector having many values as NA >> and it is giving : >> Warning message: >> NAs introduced by coercion >> >> Can anyone help me to know how to remove this warning and sor it out? >> >> Thanks >> Bienvenue >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >