[R] replicate data.frame n times

[David Winsemius]

On Oct 11, 2011, at 4:22 PM, Bert Gunter wrote:

> Replicate the row indices?
>
> x[rep(seq_len(nrow(x)), k), ]

Or the column indices.

x[ , rep(seq_len(length(x)), k) ]

--  
David,
>
> -- Bert
>
> On Tue, Oct 11, 2011 at 12:55 PM, Martin Batholdy
> <batholdy at googlemail.com>wrote:
>
>> Hi,
>>
>>
>> is there a way to replicate a data.frame like you can replicate the  
>> entries
>> of a vector (with the repeat-function)?
>>
>> I want to do this:
>>
>> x <- data.frame(x, x)
>> (where x is a data.frame).
>>
>>
>> but n times.
>>
>>
>>
>> And it should be as cpu / memory efficient as possible, since n is  
>> pretty
>> big in my case.
>>
>>
>>
>> thanks for any suggestions!
>> ______________________________________________
>> R-help at r-project.org mailing list
>> 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.
>>
>
>
>
> -- 
> "Men by nature long to get on to the ultimate truths, and will often  
> be
> impatient with elementary studies or fight shy of them. If it were  
> possible
> to reach the ultimate truths without the elementary studies usually  
> prefixed
> to them, these would not be preparatory studies but superfluous  
> diversions."
>
> -- Maimonides (1135-1204)
>
> Bert Gunter
> Genentech Nonclinical Biostatistics
> 467-7374
> http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> 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.

David Winsemius, MD
West Hartford, CT