NAG CL Interface
e04nyc (qpconvex2_​sparse_​option_​double_​get)

Settings help

CL Name Style:

1 Purpose

e04nyc is used to get the value of a double optional parameter. e04nyc can be used before or after calling e04nqc.

2 Specification

#include <nag.h>
void  e04nyc (const char *string, double *rvalue, Nag_E04State *state, NagError *fail)
The function may be called by the names: e04nyc, nag_opt_qpconvex2_sparse_option_double_get or nag_opt_sparse_convex_qp_option_get_double.

3 Description

e04nyc obtains the current value of a double option. For example
e04nyc ("Feasibility Tolerance", &featol, &state, &fail);
will result in the value of the optional parameter Feasibility Tolerance being output in featol.
A complete list of optional parameters, their abbreviations, synonyms and default values is given in Section 12 in e04nqc.

4 References


5 Arguments

1: string const char * Input
On entry: a single valid keyword of a double optional parameter (as described in Section 12 in e04nqc).
2: rvalue double * Output
On exit: the double value associated with the keyword in string.
3: state Nag_E04State * Communication Structure
state contains internal information required for functions in this suite. It must not be modified in any way.
4: 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

Dynamic memory allocation failed.
See Section 3.1.2 in the Introduction to the NAG Library CL Interface for further information.
On entry, argument value had an illegal value.
The supplied option is invalid. Check that the keywords are neither ambiguous nor misspelt. The option string is ‘value’.
The initialization function e04npc has not been called.
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.
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.

7 Accuracy

Not applicable.

8 Parallelism and Performance

Background information to multithreading can be found in the Multithreading documentation.
e04nyc is not threaded in any implementation.

9 Further Comments


10 Example

See e04nrc.