Impala Documentation

template<class DstArrayT, class SrcArrayT>

double Impala::Core::Feature::IntWeibullNgbPnLoop< DstArrayT, SrcArrayT >::TriGamma ( double x ) [inline]

Definition at line 730 of file IntWeibullNgbPnLoop.h.

References Impala::Core::Feature::IntWeibullNgbPnLoop< DstArrayT, SrcArrayT >::dpsifn(), ISNAN, and ML_NAN.

Referenced by Impala::Core::Feature::IntWeibullNgbPnLoop< DstArrayT, SrcArrayT >::Done().

00731     {
00732       double ans;
00733       int nz, ierr;
00734       if(ISNAN(x)) return x;
00735       dpsifn(x, 1, 1, 1, &ans, &nz, &ierr);
00736       if(ierr != 0) 
00737       {
00738         errno = EDOM;
00739         return ML_NAN;
00740       }
00741       return ans;
00742     } // double triGamma()

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