e04tj: FL CL CPP AD

NAG AD Library
e04tj_a1w_f (handle_set_linconstr_coeff_a1w)

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.

Keyword Search:

NAG Library Manual, Mark 27.1

Interfaces: FL CL CPP AD

NAG AD Library Introduction

E04 (Opt) Chapter Contents

E04 (Opt) Chapter Introduction (FL)

e04tj: FL CL CPP AD

▸▿ 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

1 Purpose

e04tj_a1w_f is the adjoint version of the primal routine e04tjf.

2 Specification

Fortran Interface

Subroutine e04tj_a1w_f (

ad_handle, handle, idlc, icolbj, bij, ifail)

Integer, Intent (In)	::	idlc, icolbj
Integer, Intent (Inout)	::	ifail
Type (nagad_a1w_w_rtype), Intent (In)	::	bij
Type (c_ptr), Intent (Inout)	::	ad_handle
Type (c_ptr), Intent (In)	::	handle

C++ Header Interface

#include <nagad.h>

void e04tj_a1w_f_ (

void *&ad_handle, void *handle, const Integer &idlc, const Integer &icolbj, const nagad_a1w_w_rtype &bij, Integer &ifail)

The routine may be called by the names e04tj_a1w_f or nagf_opt_handle_set_linconstr_coeff_a1w. The corresponding t1w and p0w variants of this routine are also available.

3 Description

e04tj_a1w_f is the adjoint version of the primal routine e04tjf.

e04tjf is a part of the NAG optimization modelling suite and sets or modifies a single element in the linear constraint matrix of the problem. For further information see Section 3 in the documentation for e04tjf.

4 References

5 Arguments

In addition to the arguments present in the interface of the primal routine, e04tj_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.

1: ad_handle – Type (c_ptr) Input/Output: On entry: a handle to the AD configuration data object, as created by x10aa_a1w_f.
2: handle – Type(c_ptr) Input
3: idlc – Integer Input
4: icolbj – Integer Input
5: bij – Type (nagad_a1w_w_rtype) Input
6: ifail – Integer Input/Output

6 Error Indicators and Warnings

e04tj_a1w_f preserves all error codes from e04tjf and in addition can return:

$ifail = - 89$: An unexpected AD error has been triggered by this routine. Please contact NAG.
See Section 4.8.2 in the NAG AD Library Introduction for further information.