randomOption

Selects the uniform (0,1) multiplicative congruential pseudorandom number generator.

Synopsis

randomOption (generatorOption)

Required Arguments

int generatorOption (Input)

Indicator of the generator. The random number generator is a multiplicative congruential generator with modulus \(2^{31}-1\). Argument generatorOption is used to choose the multiplier and whether or not shuffling is done.

generatorOption	Generator
1	multiplier 16807 used
2	multiplier 16807 used with shuffling
3	multiplier 397204094 used
4	multiplier 397204094 used with shuffling
5	multiplier 950706376 used
6	multiplier 950706376 used with shuffling

Description

The PyIMSL uniform pseudorandom number generators use a multiplicative congruential method, with or without shuffling. The value of the multiplier and whether or not to use shuffling are determined by randomOption. The description of function randomUniform may provide some guidance in the choice of the form of the generator. If no selection is made explicitly, the generators use the multiplier 16807 without shuffling. This form of the generator has been in use for some time (Lewis et al. 1969).

Example

The statement

randomOption(1)

selects the simple multiplicative congruential generator with multiplier 16807. Since this is the same as the default, this statement has no effect unless randomOption had previously been called in the same program to select a different generator.