Just to add:
You could convert "logi" to "numeric" by:
Large_Table2<-data.frame(matrix(nrow = 0, ncol=1000, dimnames =
list(c(),paste0("Var", 1:1000))))
str(Large_Table2)
#'data.frame': 0 obs. of 1000 variables:
# $ Var1 : logi
# $ Var2 : logi
# $ Var3 : logi
-------------------
Large_Table2[]<- lapply(Large_Table2,as.numeric)
str(Large_Table2)
#'data.frame': 0 obs. of 1000 variables:
# $ Var1 : num
# $ Var2 : num
# $ Var3 : num
Large_Table<- data.frame(lapply(paste0("Var",1:1000),function(x)
{x1<-data.frame(numeric());colnames(x1)<-x; x1}))
identical(Large_Table,Large_Table2)
#[1] TRUE
A.K.
----- Original Message -----
From: Ista Zahn <istaz...@gmail.com>
To: Pooya Lalehzari <plalehz...@platinumlp.com>
Cc: arun <smartpink...@yahoo.com>; "r-help@r-project.org" <r-help@r-project.org>
Sent: Thursday, August 15, 2013 5:19 PM
Subject: Re: [R] How can I create a data.table with 1000 variables
(Var1:Var1000)
On Thu, Aug 15, 2013 at 5:09 PM, Pooya Lalehzari
<plalehz...@platinumlp.com> wrote:
>
> Here is the sample code.
>
> Large_Table = data.frame(
> Var1=numeric(),
> Var2=numeric(),
> Var3=numeric(),
> .
> .
> .
> Var1000=numeric())
> Ideally, I would like to say
> Large_Table = data.frame(
> Var1-Var1000=numeric()
> )
One way is to create a matrix of the desired dimensions and convert it
to a data.frame, e.g
data.frame(matrix(nrow = 0, ncol=1000, dimnames = list(c(),
paste("Var", 1:1000))))
Best,
Ista
>
> Or maybe the answer is not to declare them and just create the variables as
> needed (i.e. in the for-loop that will use the data.frame.)
>
>
> -----Original Message-----
> From: arun [mailto:smartpink...@yahoo.com]
> Sent: Thursday, August 15, 2013 5:04 PM
> To: Pooya Lalehzari
> Subject: Re: [R] How can I create a data.table with 1000 variables
> (Var1:Var1000)
>
> This question is still not clear. Could you show a reproducible example as
> to what you want? In the title, it says to create 1000 variable and now your
> explanation is "refer". Also, it is unclear as to what function in SAS you
> are referring to. As Bert said, please follow the posting guide while
> posting.
> Best.
>
>
>
>
> ----- Original Message -----
> From: Pooya Lalehzari <plalehz...@platinumlp.com>
> To: Bert Gunter <gunter.ber...@gene.com>
> Cc: "r-help@r-project.org" <r-help@r-project.org>
> Sent: Thursday, August 15, 2013 4:27 PM
> Subject: Re: [R] How can I create a data.table with 1000 variables
> (Var1:Var1000)
>
> Sorry. data.table or even data.frame (as they are related). My question is,
> if there is a short form to refer to all 1000 of them similar to what exists
> in SAS.
>
> Thank you,
> Pooya Lalehzari.
>
>
> -----Original Message-----
> From: Bert Gunter [mailto:gunter.ber...@gene.com]
> Sent: Thursday, August 15, 2013 4:24 PM
> To: Pooya Lalehzari
> Cc: r-help@r-project.org
> Subject: Re: [R] How can I create a data_table with 1000 variables
> (Var1:Var1000)
>
> Please:
>
> 1. Define "data_table" (??)
>
> 2. Follow the advice from the posting guide link below to post a coherent
> question.
>
> -- Bert
>
> On Thu, Aug 15, 2013 at 1:16 PM, Pooya Lalehzari <plalehz...@platinumlp.com>
> wrote:
> > Hello everyone,
> > How can I create a data_table with 1000 variables (Var1:Var1000)?
> >
> > Thank you,
> > Pooya Lalehzari
> >
> >
> >
> > THIS E-MAIL IS FOR THE SOLE USE OF THE INTENDED RECIPIENT(S) AND MAY
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> > ______________________________________________
> > R-help@r-project.org mailing list
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>
>
>
> --
>
> Bert Gunter
> Genentech Nonclinical Biostatistics
>
> Internal Contact Info:
> Phone: 467-7374
> Website:
> http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm
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>
>
>
>
> THIS E-MAIL IS FOR THE SOLE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN
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> ______________________________________________
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