[R] Length problem
Benilton Carvalho
bcarvalh at jhsph.edu
Mon Feb 11 16:56:12 CET 2008
if "data" was your data.frame, data[4:length(data)] was also a
data.frame.
but, c(data[4:length(data)] ) coerces it to a list.
therefore coppie is a list.
coppie[1] is also a list of length 1...
compare that to: coppie[[1]]
b
On Feb 11, 2008, at 10:38 AM, milton ruser wrote:
> Ciao Paolo,
>
> How about you show some row of your data?
> How many columns have your data.frame? One?
> By the way "data" is not a so good name for your data frame.
>
> We will be very happy to help you
>
> Kindly,
>
> Miltinho
> Brasile
>
> On 2/11/08, Paolo Grillo <paolo.grillo at guest.unimi.it> wrote:
>>
>>
>> Hi all
>> I have this problem:
>> In my database .dta, called "data" I have five rows
>> data<-read.dta("C:\\2_CO_mmobile_ALL_Rid.dta")
>> # From this database I wuold like to create another
>> coppie<-c(data[4:length(data)])
>> but I find this
>>
>> # Length of original data
>> length(data[,4])
>> 5 RIGHT!!
>> # Length of new data
>> length(coppie[1])
>> 1 WHY??
>> Thank you all for your help
>> Paolo Grillo
>> ______________________________________________
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>> 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.
>>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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