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@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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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>

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