[R] Sample

[jim holtman]

like this:

> x
  0-100 100-250 250+
a     9      18   16
b    33      25   27
c    21      19   17
d    25      22   19
e    40      39   19
f    77      45   29
> x[sample(nrow(x), 3),]
  0-100 100-250 250+
e    40      39   19
c    21      19   17
a     9      18   16
> x[sample(nrow(x), 3),]
  0-100 100-250 250+
c    21      19   17
e    40      39   19
d    25      22   19
> x[sample(nrow(x), 3),]
  0-100 100-250 250+
b    33      25   27
f    77      45   29
c    21      19   17
> x[sample(nrow(x), 3),]
  0-100 100-250 250+
f    77      45   29
c    21      19   17
a     9      18   16


On Sat, Jul 26, 2008 at 5:12 PM, Raphael Saldanha
<saldanha.plangeo at gmail.com> wrote:
> Hi!
>
> I have a data.frame, like this one:
>
>> data
>  0-100 100-250 250+
> a     9      18   16
> b    33      25   27
> c    21      19   17
> d    25      22   19
> e    40      39   19
> f    77      45   29
>
> If I request a sample of 2, I have the following:
>
>> sample(data, 2)
>  0-100 250+
> a     9   16
> b    33   27
> c    21   17
> d    25   19
> e    40   19
> f    77   29
>
> How can I request a sample from the rows???
>
>
> --
> Raphael Saldanha
> UFJF - Brazil
> saldanha.plangeo at gmail.com
>
>
> Woody Allen  - "I don't want to achieve immortality through my work. I want
> to achieve it through not dying."
>
>        [[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.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?