The OpenD Programming Language

fp_poissonPMF

mir stat distribution poisson

Computes the poisson probability mass function (PMF) directly with extended floating point types (e.g. Fp!128), which provides additional accuracy for large values of lambda or k.

@safe pure nothrow @nogc
T
fp_poissonPMF
(
T
)
(
const size_t k
,
const T lambda
)
if (
is(T == Fp!size,
size_t size
)
)

Parameters

k size_t

value to evaluate PMF (e.g. number of "heads")

lambda T

expected rate of occurence

Examples

import mir.bignum.fp: Fp;
import mir.conv: to;
import mir.math.common: approxEqual, exp;

for (size_t i; i <= 10; i++) {
    assert(i.fp_poissonPMF(Fp!128(5.0)).to!double.approxEqual(poissonPMF(i, 5.0)));
}

See Also

Poisson Distribution

Meta

Source

See Implementation

mir stat distribution poisson enumsfunctionstemplates
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