Hi,
I have a vector, which contains both strings and numbers, e.g.
> foo <- c("str1",1234,"str2",0.9876)
I want to know if a distinct element of the vector is a string or a number and
took "is.numeric", but
> is.numeric(foo[2])
[1] FALSE
because R treats the numbers in a mixed vectors as strings:
> foo
[1] "str1" "1234" "str2" "0.9876"
As a workaround I use:
> !is.na(as.numeric(foo[2]))
[1] TRUE
> !is.na(as.numeric(foo[1]))
[1] FALSE
Warning message:
NAs introduced by coercion
This works, but I always get the spurious warning messages. Do you know a
better way or a way to suppress these warning messages?
Thanks,
Arne
--
Arne Henningsen
Department of Agricultural Economics
Christian-Albrechts-University Kiel
24098 Kiel, Germany
Tel: +49-431-880-4445
Fax: +49-431-880-1397
[EMAIL PROTECTED]
http://www.uni-kiel.de/agrarpol/ahenningsen.html
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