@saehrimnir/druidjs / Randomizer

Class: Randomizer

Defined in: util/randomizer.js:7

Constructors

Constructor

new Randomizer(_seed?: number): Randomizer;

Defined in: util/randomizer.js:28

Mersenne Twister random number generator.

Parameters

Parameter	Type	Description
_seed?	number	The seed for the random number generator. If _seed == null then the actual time gets used as seed. Default is new Date().getTime()

Returns

Randomizer

See

https://github.com/bmurray7/mersenne-twister-examples/blob/master/javascript-mersenne-twister.js

Properties

Property	Type	Default value	Defined in
_LOWER_MASK	number	0x7fffffff	util/randomizer.js:12
_M	number	397	util/randomizer.js:9
_MATRIX_A	number	0x9908b0df	util/randomizer.js:10
_mt	number[]	undefined	util/randomizer.js:15
_mti	number	undefined	util/randomizer.js:17
_N	number	624	util/randomizer.js:8
_seed	number	undefined	util/randomizer.js:19
_UPPER_MASK	number	0x80000000	util/randomizer.js:11
_val	number | null | undefined	undefined	util/randomizer.js:113

Accessors

random

Get Signature

get random(): number;

Defined in: util/randomizer.js:63

Returns a float between 0 and 1.

Returns

number

• A random number between [0, 1]

---

random_int

Get Signature

get random_int(): number;

Defined in: util/randomizer.js:72

Returns an integer between 0 and MAX_INTEGER.

Returns

number

• A random integer.

---

seed

Get Signature

get seed(): number;

Defined in: util/randomizer.js:54

Returns the seed of the random number generator.

Returns

number

• The seed.

Set Signature

set seed(_seed: number): void;

Defined in: util/randomizer.js:36

Parameters

Parameter	Type
_seed	number

Returns

void

Methods

choice()

choice<T>(A: T[], n: number): T[];

Defined in: util/randomizer.js:132

Type Parameters

Type Parameter	Description
T	Returns samples from an input Matrix or Array.

Parameters

Parameter	Type	Description
A	T[]	The input Matrix or Array.
n	number	The number of samples.

Returns

T[]

A random selection form A of n samples.

---

gauss_random()

gauss_random(): number;

Defined in: util/randomizer.js:109

Returns

number

---

choice()

static choice<T>(
   A: T[], 
   n: number, 
   seed?: number): T[];

Defined in: util/randomizer.js:171

Type Parameters

Type Parameter	Description
T	Returns samples from an input Matrix or Array.

Parameters

Parameter	Type	Default value	Description
A	T[]	undefined	The input Matrix or Array.
n	number	undefined	The number of samples.
seed	number	1212	The seed for the random number generator.

Returns

T[]

• A random selection form A of n samples.