e04nsc may be used to supply individual optional parameters to e04nqc. The initialization function e04npc must have been called before calling e04nsc.

2 Specification

#include <nag.h>

void	e04nsc (const char string, Nag_E04State state, NagError *fail)

The function may be called by the names: e04nsc, nag_opt_qpconvex2_sparse_option_string or nag_opt_sparse_convex_qp_option_set_string.

3 Description

e04nsc may be used to supply values for optional parameters to e04nqc. It is only necessary to call e04nsc for those arguments whose values are to be different from their default values. One call to e04nsc sets one argument value.

Each optional parameter is defined by a single character string, consisting of one or more items. The items associated with a given option must be separated by spaces, or equals signs

[=]

. Alphabetic characters may be upper or lower case. The string

Print Level = 1

is an example of a string used to set an optional parameter. For each option the string contains one or more of the following items:

–a mandatory keyword;
–a phrase that qualifies the keyword;
–a number that specifies an Integer or double value. Such numbers may be up to $40$ contiguous characters which can be read using C's d or g formats, terminated by a space if this is not the last item on the line.

For e04nsc, each user-specified option is not normally printed as it is defined, but this printing may be turned on using the keyword

List

. Thus the statement

e04nsc ("List", &state, &fail);

turns on printing of this and subsequent options. Printing may be turned off again using the keyword

Nolist

Optional parameter settings are preserved following a call to e04nqc and so the keyword

Defaults

is provided to allow you to reset all the optional parameters to their default values before a subsequent call to e04nqc.

A complete list of optional parameters, their abbreviations, synonyms and default values is given in Section 12 in e04nqc.

4 References

None.

5 Arguments

1: $string$ – const char * Input: On entry: a single valid option string (see Section 3 in e04nsc and Section 12 in e04nqc).
2: $state$ – Nag_E04State * Communication Structure: state contains internal information required for functions in this suite. It must not be modified in any way.
3: $fail$ – NagError * Input/Output: The NAG error argument (see Section 7 in the Introduction to the NAG Library CL Interface).

6 Error Indicators and Warnings

NE_ALLOC_FAIL: Dynamic memory allocation failed.
See Section 3.1.2 in the Introduction to the NAG Library CL Interface for further information.
NE_BAD_PARAM: On entry, argument $⟨ value ⟩$ had an illegal value.
NE_E04_OPTION_INVALID: The supplied option is invalid. Check that the keywords are neither ambiguous nor misspelt. The option string is ‘ $⟨ value ⟩$ ’.
NE_E04NPC_NOT_INIT: The initialization function e04npc has not been called.
NE_INTERNAL_ERROR: An internal error has occurred in this function. Check the function call and any array sizes. If the call is correct then please contact NAG for assistance.
See Section 7.5 in the Introduction to the NAG Library CL Interface for further information.
NE_NO_LICENCE: Your licence key may have expired or may not have been installed correctly.
See Section 8 in the Introduction to the NAG Library CL Interface for further information.