[R] Using sample() with a data frame ?

[Martin Hvidberg]

I have a data frame (daf1), that holds +80000 records, and 10 variables (i.e. 10 columns and some 80000 rows)

> length(daf1)
[1] 10
> length(daf1[,1])
[1] 83805

I would like to sample() e.g. 10000 records from this. I use:

> daf2 <- sample(daf1, 1000, replace = FALSE, prob = NULL)
Error in `[.data.frame`(x, .Internal(sample(length(x), size, replace,  : 
  cannot take a sample larger than the population when 'replace = FALSE'

As length(daf1) is 10, it thinks I'm taking 10000 samples from a size 10 population... Arghhh

How do I go about sampeling from a data frame?

:-( Martin