e04tj is the AD Library version of the primal routine e04tjf. Based (in the C++ interface) on overload resolution, e04tj can be used for primal, tangent and adjoint evaluation. It supports tangents and adjoints of first order.

2 Specification

Fortran Interface

Subroutine e04tj_AD_f (

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

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

Corresponding to the overloaded C++ function, the Fortran interface provides five routines with names reflecting the type used for active real arguments. The actual subroutine and type names are formed by replacing AD and ADTYPE in the above as follows:

when ADTYPE is	Real(kind=nag_wp)	then AD is p0w
when ADTYPE is	Type(nagad_a1w_w_rtype)	then AD is a1w
when ADTYPE is	Type(nagad_t1w_w_rtype)	then AD is t1w

C++ Header Interface

#include <dco.hpp>
#include <nagad.h>
namespace nag {
namespace ad {

void e04tj (

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

}
}

The function is overloaded on ADTYPE which represents the type of active arguments. ADTYPE may be any of the following types:
double,
dco::ga1s<double>::type,
dco::gt1s<double>::type

Note: this function can be used with AD tools other than dco/c++. For details, please contact NAG.

3 Description

e04tj is the AD Library 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 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 – Pointer to AD Data Input/Output: On entry: a handle to the AD configuration data object, as created by x10aa.
2: handle – Type(c_ptr) Input
3: idlc – Integer Input
4: icolbj – Integer Input
5: bij – ADTYPE Input
6: ifail – Integer Input/Output

6 Error Indicators and Warnings

e04tj 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.

$ifail = - 199$: The routine was called using a mode that has not yet been implemented.

$ifail = - 443$: On entry: ad_handle is nullptr.
This check is only made if the overloaded C++ interface is used with arguments not of type double.