[R] Sample on dataframe

[Jarekj]

yes, that is
thanks

milton ruser pisze:
> I hope this helps
>  
>
>  
>
> my.df<-read.table(stdin(), head=T, sep=" ")
> V5 V5.1 V5.2 V5.3 V5.4 V5.5
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
> -5890.18905 -6019.84665 -6211.06545 -6198.9353 -6616.8677 -6498.7183
>
> number.of.records<-5
> my.df.subset<-my.df[sample(1:dim(my.df)[1], size=number.of.records, 
> replace=F),]
> my.df.subset
>
> You can change "replace" by T if you allow repeat rows.
>  
> Cheers,
>  
> miltinho astronauta
> brazil
>
>  
>
>
>
>  
> On 7/23/08, *Jarekj* <jarekj w amu.edu.pl <mailto:jarekj w amu.edu.pl>> 
> wrote:
>
>     Hi
>     I'm looking for solution or function which I can use to sample
>     data frame, to obtain new (smaller) data frame similar to sample()
>     function
>     Jarek Jasiewicz
>
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>
>