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Added nans to zeta function.

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This commit is contained in:
Till Hoffmann 2016-04-09 20:07:36 +01:00
parent a350c25a39
commit de057ebe54
1 changed files with 3 additions and 2 deletions
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5
Eigen/src/Core/SpecialFunctions.h
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@ -881,13 +881,14 @@ struct zeta_impl {
const Scalar maxnum = NumTraits<Scalar>::infinity(); const Scalar maxnum = NumTraits<Scalar>::infinity();
const Scalar zero = 0.0, half = 0.5, one = 1.0; const Scalar zero = 0.0, half = 0.5, one = 1.0;
const Scalar machep = igamma_helper<Scalar>::machep(); const Scalar machep = igamma_helper<Scalar>::machep();
const Scalar nan = NumTraits<Scalar>::quiet_NaN();
if( x == one ) if( x == one )
return maxnum; return maxnum;
if( x < one ) if( x < one )
{ {
return zero; return nan;
} }
if( q <= zero ) if( q <= zero )
@ -899,7 +900,7 @@ struct zeta_impl {
p = x; p = x;
r = numext::floor(p); r = numext::floor(p);
if (p != r) if (p != r)
return zero; return nan;
} }
/* Permit negative q but continue sum until n+q > +9 . /* Permit negative q but continue sum until n+q > +9 .