e01bg_ad_f : NAG AD Library Routine Document, Mark 26

Fortran Interface

Subroutine e01bg_a1w_f (

ad_handle, n, x, f, d, m, px, pf, pd, ifail)

Integer, Intent (In)	::	n, m
Integer, Intent (Inout)	::	ifail
Type (nagad_a1w_w_rtype), Intent (In)	::	x(n), f(n), d(n), px(m)
Type (nagad_a1w_w_rtype), Intent (Out)	::	pf(m), pd(m)
Type (c_ptr), Intent (In)	::	ad_handle

C++ Header Interface

#include <nagad.h>

void e01bg_a1w_f_ (

void *&ad_handle, const Integer &n, nagad_a1w_w_rtype x[], nagad_a1w_w_rtype f[], nagad_a1w_w_rtype d[], const Integer &m, nagad_a1w_w_rtype px[], nagad_a1w_w_rtype pf[], nagad_a1w_w_rtype pd[], Integer &ifail)

Description

e01bgf evaluates a piecewise cubic Hermite interpolant and its first derivative at a set of points. For further information see Section 3 in the documentation for e01bgf .

References

Arguments

e01bg_a1w_f provides access to all the arguments available in the primal routine. There are also additional arguments specific to AD. A tooltip popup for each argument can be found by hovering over the argument name in Section 2 and a summary of the arguments are provided below:

ad_handle – a handle to the AD configuration data object, as created by x10aa_a1w_f.
n – n, x, f and d must be unchanged from the previous call of routine.
x – n, x, f and d must be unchanged from the previous call of routine.
f – n, x, f and d must be unchanged from the previous call of routine.
d – n, x, f and d must be unchanged from the previous call of routine.
m – $m$ , the number of points at which the interpolant is to be evaluated.
px – the $m$ values of $x$ at which the interpolant is to be evaluated.
pf – on exit: $pf (i)$ contains the value of the interpolant evaluated at the point $px (i)$ , for $i = 1, 2, \dots, m$ .
pd – on exit: $pd (i)$ contains the first derivative of the interpolant evaluated at the point $px (i)$ , for $i = 1, 2, \dots, m$ .
ifail – on entry: ifail must be set to $0$ , $- 1 or 1$ . on exit: ifail = 0 unless the routine detects an error or a warning has been flagged (see Section 6).

Error Indicators and Warnings

e01bg_a1w_f preserves all error codes from e01bgf and in addition can return:

$ifail = - 89$: An unexpected AD error has been triggered by this routine. Please contact NAG.
See Section 5.2 in the NAG AD Library Introduction for further information.

$ifail = - 899$: Dynamic memory allocation failed for AD.
See Section 5.1 in the NAG AD Library Introduction for further information.

Language	Source File	Data	Results
Fortan	e01bg_a1w_fe.f90	e01bg_a1w_fe.d	e01bg_a1w_fe.r
C++	e01bg_a1w_hcppe.cpp	e01bg_a1w_hcppe.d	e01bg_a1w_hcppe.r

NAG AD Library Routine Document

e01bg_a1w_f (dim1_monotonic_deriv_a1w)

▸▿ Contents

1

Purpose

2

Specification

3

Description

4

References

5

Arguments

6

Error Indicators and Warnings

7

Accuracy

8

Parallelism and Performance

9

Further Comments

10

Example

NAG AD Library Routine Document

e01bg_a1w_f (dim1_monotonic_deriv_a1w)

▸▿ Contents

1 Purpose

2 Specification

3 Description

4 References

5 Arguments

6 Error Indicators and Warnings

7 Accuracy

8 Parallelism and Performance

9 Further Comments

10 Example