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:
[1] 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
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