Note:a1w denotes that first order adjoints are computed in working precision; this has the corresponding argument type nagad_a1w_w_rtype.
Also available is the t1w (first order tangent linear) mode, the interface of which is implied by replacing a1w by t1w throughout this document.
Additionally, the p0w (passive interface, as alternative to the FL interface) mode is available and can be inferred by replacing of active types by the corresponding passive types.
The method of codifying AD implementations in the routine name and corresponding argument types is described in the NAG AD Library Introduction.
The routine may be called by the names d01bd_a1w_f or nagf_quad_dim1_fin_smooth_a1w. The corresponding t1w and p0w variants of this routine are also available.
is the adjoint version of the primal routine
d01bdf calculates an approximation to the integral of a function over a finite interval :
It is non-adaptive and as such is recommended for the integration of ‘smooth’ functions. These exclude integrands with singularities, derivative singularities or high peaks on , or which oscillate too strongly on .
For further information see Section 3 in the documentation for d01bdf.
Patterson T N L (1968) The Optimum addition of points to quadrature formulae Math. Comput.22 847–856
Piessens R, de Doncker–Kapenga E, Überhuber C and Kahaner D (1983) QUADPACK, A Subroutine Package for Automatic Integration Springer–Verlag
In addition to the arguments present in the interface of the primal routine,
d01bd_a1w_f includes some arguments specific to AD.
A brief summary of the AD specific arguments is given below. For the remainder, links are provided to the corresponding argument from the primal routine.
A tooltip popup for all arguments can be found by hovering over the argument name in Section 2 and in this section.