[R] Sampling problems
R. Michael Weylandt
michael.weylandt at gmail.com
Thu Mar 8 14:51:00 CET 2012
Please use dput() to give a reproducible example: I can make this work
on a data frame quite easily --
x <- data.frame(1:10, letters[1:10], rnorm(10))
x[sample(nrow(x), 5), ]
So it's not a problem with something being a data frame or having factors.
On Thu, Mar 8, 2012 at 5:16 AM, Oritteropus <lucasantini85 at hotmail.com> wrote:
> Thanks, but it doesn't work either, it gives me the same message error.
> It works just if my first sample is taken in this way:
> mysample <- sample(1:nrow(MeanA), 20, replace=FALSE)
> However, in this way it sample just the number of rows:
>  71 24 12 36 2 39 69 62 43 38 9 44 13 54 50 63 67 66 37 28
> but not the data inside. I need to sample in this way:
> mysample <- MeanA[sample(1:nrow(MeanA), 20, replace=FALSE),]
> to get a sample like this
> HRkm Mean.mf Mean.mfm Loc Diet Terr
> Soc Type Soc.Ter W.cat.0.25 W.cat.0.5
> -2.49 -0.43 2.57 A
> O T S D
> TS b
> 23 -2.05 0.67 T
> C N S D
> NS A
> This is an example of my dataframe
> View this message in context: http://r.789695.n4.nabble.com/Sampling-problems-tp4453752p4456048.html
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> and provide commented, minimal, self-contained, reproducible code.
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