This function provides a very efficient way to pull an integer random sample
sequence from an integer interval.
Usage
sample_seq(low, high, length)
Arguments
low
The lower limit of the interval (inclusive).
high
The higher limit of the interval (inclusive).
length
The length of the sample.
Value
An increasing numeric vector containing integers, the sample.
Details
The algorithm runs in O(length) expected time, even if
high-low is big. It is much faster (but of course less general) than
the builtin sample function of R.
References
Jeffrey Scott Vitter: An Efficient Algorithm for Sequential
Random Sampling, ACM Transactions on Mathematical Software, 13/1,
58--67.