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Function std.random.uniform01

Generates a uniformly-distributed floating point number of type T in the range [0, 1). If no random number generator is specified, the default RNG rndGen will be used as the source of randomness.

T uniform01(T)()
if (isFloatingPoint!T);

T uniform01(T, UniformRNG) (
  ref UniformRNG rng
)
if (isFloatingPoint!T && isUniformRNG!UniformRNG);

uniform01 offers a faster generation of random variates than the equivalent uniform!"[)"(0.0, 1.0) and so may be preferred for some applications.

Parameters

NameDescription
rng (optional) random number generator to use; if not specified, defaults to rndGen

Returns

Floating-point random variate of type T drawn from the uniform distribution across the half-open interval [0, 1).

Example

import std.math : feqrel;

auto rnd = MinstdRand0(42);

assert(rnd.uniform01.feqrel(0.000328707) > 20);
assert(rnd.uniform01!float.feqrel(0.524587) > 20);

Authors

Andrei Alexandrescu Masahiro Nakagawa (Xorshift random generator) Joseph Rushton Wakeling (Algorithm D for random sampling) Ilya Yaroshenko (Mersenne Twister implementation, adapted from mir-random)

License

Boost License 1.0.