bigsample samples quicker from large pools than sample does.
Usage
bigsample(x, ...)
# Default S3 method
bigsample(x, size, replace = FALSE, prob = NULL, negative = FALSE, ...)
# S3 method for class 'ff'
bigsample(x, size, replace = FALSE, prob = NULL, ...)
Arguments
- x
the pool to sample from
- size
the number of elements to sample
- replace
TRUE to use sampling with replacement
- prob
optional vector of sampling probabilities (recyled to pool length)
- negative
negative
- ...
...
Details
For small pools sample is called.
Note
Note that bigsample and sample do not necessarily return the same sequence of elements when set.seed is set before.
Value
a vector of elements sampled from the pool (argument 'x')
Author
Daniel Adler, Jens Oehlschlägel, Walter Zucchini