@technobuddha > library > Random > Number Generation

Class: MersenneTwister

Defined in: mersenne-twister.ts:126

Implements the Mersenne Twister pseudorandom number generator (MT19937).

The Mersenne Twister is a widely used PRNG known for its long period (2^19937−1), high performance, and high-quality randomness. This class provides methods to seed the generator and produce random numbers in various formats and intervals.

Remarks

• The generator can be seeded with a single number or an array of numbers.
• Methods are provided to generate 32-bit and 31-bit integers, as well as floating-point numbers in different intervals.
• This implementation is based on the original C code by Makoto Matsumoto and Takuji Nishimura.

Example

const mt = new MersenneTwister(1234);
mt.genrandInt32(); // 1982695502
mt.genrandReal1(); // 0.33979119391641377
mt.genrandReal2(); // 0.006705045932903886
mt.genrandRes53(); // 0.489361593755425

See

• https://en.wikipedia.org/wiki/Mersenne_Twister
• http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html

Constructors

Constructor

new MersenneTwister(seed: number | number[]): MersenneTwister;

Defined in: src/mersenne-twister.ts:130

Parameters

Parameter	Type
seed	number | number[]

Returns

MersenneTwister

Methods

genrandInt31()

genrandInt31(): number;

Defined in: src/mersenne-twister.ts:230

generates a random number on [0,0x7fffffff]-interval

Returns

number

---

genrandInt32()

genrandInt32(): number;

Defined in: src/mersenne-twister.ts:198

generates a random number on [0,0xffffffff]-interval

Returns

number

---

genrandReal1()

genrandReal1(): number;

Defined in: src/mersenne-twister.ts:235

generates a random number on [0,1]-real-interval

Returns

number

---

genrandReal2()

genrandReal2(): number;

Defined in: src/mersenne-twister.ts:241

generates a random number on [0,1)-real-interval

Returns

number

---

genrandReal3()

genrandReal3(): number;

Defined in: src/mersenne-twister.ts:247

generates a random number on (0,1)-real-interval

Returns

number

---

genrandRes53()

genrandRes53(): number;

Defined in: src/mersenne-twister.ts:253

generates a random number on [0,1) with 53-bit resolution

Returns

number

---

initByArray()

initByArray(key: number[]): void;

Defined in: src/mersenne-twister.ts:162

initialize with array

Parameters

Parameter	Type
key	number[]

Returns

void

---

initGenrand()

initGenrand(seed: number): void;

Defined in: src/mersenne-twister.ts:146

initialize with a seed

Parameters

Parameter	Type
seed	number

Returns

void

---

setSeed()

setSeed(seed: number | number[]): void;

Defined in: src/mersenne-twister.ts:137

Sets the seed for the random number generator.

Parameters

Parameter	Type
seed	number | number[]

Returns

void