Hello,
A way to see this is with ?class
# OP's code
typeof(c(1,"2")) # "character"
d.f <- data.frame(C=c(1,"2"))
typeof(d.f$C) # "integer"
# And check the objects' classes
class(c(1,"2")) # "character"
class(d.f$C) # "factor"
Hope this helps,
Rui Barradas
?s 08:19 de 19/07/19, Peter Langfelder escreveu:> I think your character vector got converted to a factor. See ?options,
> section stringsAsFactors:
>
> ?stringsAsFactors?: The default setting for arguments of
> ?data.frame? and ?read.table?.
> The default is TRUE, so strings get converted to factors when building
> data frames.
>
> Set options(stringsAsFactors=FALSE) and try again.
>
> Peter
>
> On Fri, Jul 19, 2019 at 12:15 AM Michael Meyer via R-devel
> <r-devel at r-project.org> wrote:
>>
>>
>>
>> Greetings,
>>
>> Running R 3.5.0 under Windows 7
>>
>> typeof(c(1,"2")) yields "character" as expected.
But in
>>
>> d.f <- data.frame(C=c(1,"2"))
>>
>> typeof(d.f$C) yields "integer".
>>
>> Is this a bug?
>>
>> Michael Meyer
>>
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>
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