[Rd] inconsistent behaviour of c(...)

[Rui Barradas]

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


Às 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 using 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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