e02bb_ad_f : NAG AD Library Routine Document, Mark 26

Fortran Interface

Subroutine e02bb_a1w_f (

ad_handle, ncap7, lamda, c, x, s, ifail)

Integer, Intent (In)	::	ncap7
Integer, Intent (Inout)	::	ifail
Type (nagad_a1w_w_rtype), Intent (In)	::	lamda(ncap7), c(ncap7), x
Type (nagad_a1w_w_rtype), Intent (Out)	::	s
Type (c_ptr), Intent (In)	::	ad_handle

C++ Header Interface

#include <nagad.h>

void e02bb_a1w_f_ (

void *&ad_handle, const Integer &ncap7, nagad_a1w_w_rtype lamda[], nagad_a1w_w_rtype c[], const nagad_a1w_w_rtype &x, nagad_a1w_w_rtype &s, Integer &ifail)

Description

e02bbf evaluates a cubic spline from its B-spline representation. For further information see Section 3 in the documentation for e02bbf .

References

Arguments

e02bb_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.
ncap7 – $\bar{n} + 7$ , where $\bar{n}$ is the number of intervals (one greater than the number of interior knots, i.e., the knots strictly within the range $λ_{4}$ to $λ_{\bar{n} + 4}$ ) over which the spline is defined.
lamda – $lamda (j)$ must be set to the value of the $j$ th member of the complete set of knots, $λ_{j}$ , for $j = 1, 2, \dots, \bar{n} + 7$ .
c – the coefficient $c_{i}$ of the B-spline $N_{i} (x)$ , for $i = 1, 2, \dots, \bar{n} + 3$ .
x – the argument $x$ at which the cubic spline is to be evaluated.
s – on exit: the value of the spline, $s (x)$ .
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

e02bb_a1w_f preserves all error codes from e02bbf 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	e02bb_a1w_fe.f90	None	e02bb_a1w_fe.r
C++	e02bb_a1w_hcppe.cpp	None	e02bb_a1w_hcppe.r

NAG AD Library Routine Document

e02bb_a1w_f (dim1_spline_eval_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

e02bb_a1w_f (dim1_spline_eval_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