NAG FL Interface
e04vrf (nlp2_​sparse_​option_​integer_​get)

Settings help

FL Name Style:


FL Specification Language:


1 Purpose

e04vrf is used to get the value of an integer optional parameter. e04vrf can be used before or after calling e04vhf.

2 Specification

Fortran Interface
Subroutine e04vrf ( string, ivalue, cw, iw, rw, ifail)
Integer, Intent (Inout) :: iw(*), ifail
Integer, Intent (Out) :: ivalue
Real (Kind=nag_wp), Intent (Inout) :: rw(*)
Character (*), Intent (In) :: string
Character (8), Intent (InOut) :: cw(*)
C Header Interface
#include <nag.h>
void  e04vrf_ (const char *st, Integer *ivalue, char cw[], Integer iw[], double rw[], Integer *ifail, const Charlen length_st, const Charlen length_cw)
The routine may be called by the names e04vrf or nagf_opt_nlp2_sparse_option_integer_get.

3 Description

e04vrf obtains the current value of an integer option. For example
Call e04vrf ('Major Iterations', itnlim, cw, iw, rw, ifail)
will result in the value of the optional parameter Major Iterations Limit being output in ITNLIM.
A complete list of optional parameters, their abbreviations, synonyms and default values is given in Section 12 in e04vhf.

4 References

None.

5 Arguments

1: string Character(*) Input
On entry: a single valid keyword of an integer optional parameter (as described in Section 12 in e04vhf).
2: ivalue Integer Output
On exit: the integer value associated with the keyword in string.
3: cw(*) Character(8) array Communication Array
Note: the actual argument supplied must be the array cw supplied to the initialization routine e04vgf.
4: iw(*) Integer array Communication Array
Note: the actual argument supplied must be the array iw supplied to the initialization routine e04vgf.
5: rw(*) Real (Kind=nag_wp) array Communication Array
Note: the actual argument supplied must be the array rw supplied to the initialization routine e04vgf.
6: ifail Integer Input/Output
On entry: ifail must be set to 0, -1 or 1 to set behaviour on detection of an error; these values have no effect when no error is detected.
A value of 0 causes the printing of an error message and program execution will be halted; otherwise program execution continues. A value of -1 means that an error message is printed while a value of 1 means that it is not.
If halting is not appropriate, the value -1 or 1 is recommended. If message printing is undesirable, then the value 1 is recommended. Otherwise, the value 0 is recommended. When the value -1 or 1 is used it is essential to test the value of ifail on exit.
On exit: ifail=0 unless the routine detects an error or a warning has been flagged (see Section 6).

6 Error Indicators and Warnings

If on entry ifail=0 or -1, explanatory error messages are output on the current error message unit (as defined by x04aaf).
Errors or warnings detected by the routine:
ifail=1
The initialization routine e04vgf has not been called.
ifail=2
The supplied option string is invalid. Check that the keywords are neither ambiguous nor misspelt. The option string is ‘value’.
ifail=-99
An unexpected error has been triggered by this routine. Please contact NAG.
See Section 7 in the Introduction to the NAG Library FL Interface for further information.
ifail=-399
Your licence key may have expired or may not have been installed correctly.
See Section 8 in the Introduction to the NAG Library FL Interface for further information.
ifail=-999
Dynamic memory allocation failed.
See Section 9 in the Introduction to the NAG Library FL Interface for further information.

7 Accuracy

Not applicable.

8 Parallelism and Performance

e04vrf is not threaded in any implementation.

9 Further Comments

None.

10 Example

See e04vkf.