microsimulation (version 1.4.4)

RNGStream: S3 class to work with RngStream objects

Description

S3 class to work with RngStream objects

Use RNGStream as an old class

With method for RNGStream S3 class

Usage

RNGStream(nextStream = TRUE, iseed = NULL)
# S3 method for RNGStream
with(data, expr, ...)

Value

list of class RNGStream with components:

resetRNGkind

function to reset to the previous RNG and seed

seed

function to return the current seed

open

function to use the current seed

close

function to make the current seed equal to .Random.seed

resetStream

function to move back to start of stream

resetSubStream

function to move back to start of sub-stream

nextSubStream

function to move to next sub-stream

nextStream

function to move to next stream

the value from the expression

Arguments

nextStream

whether to move to the next stream (default=TRUE)

iseed

set seed after changing RNG (otherwise keep the current seed)

data

object of type RNGStream

expr

expression using the RNGStream

...

other arguments passed to eval()

Examples

## set up one stream
s1 <- RNGStream()
s1$open()
rnorm(1)
s1$nextSubStream()
rnorm(1)
## reset the stream
s1$resetStream()
rnorm(2)
s1$nextSubStream()
rnorm(2)

## now do with two streams
s1$resetStream()
s2 <- RNGStream()
with(s1,rnorm(1))
with(s2,rnorm(1))
s1$nextSubStream()
with(s1,rnorm(1))
## now reset the streams and take two samples each time
s1$resetStream()
s2$resetStream()
with(s1,rnorm(2))
with(s2,rnorm(2))
s1$nextSubStream()
with(s1,rnorm(2))