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Added polygamma function.

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Till Hoffmann
2016-04-01 14:35:21 +01:00
parent dd5d390daf
commit 57239f4a81
9 changed files with 118 additions and 5 deletions
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5
test/array.cpp
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@@ -331,6 +331,11 @@ template<typename ArrayType> void array_real(const ArrayType& m)
VERIFY_IS_APPROX(numext::zeta(Scalar(3), Scalar(-2.5)), RealScalar(0.054102025820864097));
VERIFY_IS_EQUAL(numext::zeta(Scalar(1), Scalar(1.2345)), // The second scalar does not matter
std::numeric_limits<RealScalar>::infinity());
// Check the polygamma against scipy.special.polygamma
VERIFY_IS_APPROX(numext::polygamma(Scalar(1), Scalar(2)), RealScalar(0.644934066848));
VERIFY_IS_APPROX(numext::polygamma(Scalar(1), Scalar(3)), RealScalar(0.394934066848));
VERIFY_IS_APPROX(numext::polygamma(Scalar(1), Scalar(25.5)), RealScalar(0.0399946696496));
{
// Test various propreties of igamma & igammac. These are normalized