d01zkc either initializes or resets the optional parameter arrays or sets a single optional parameter for supported problem solving functions in
Chapter D01.
Optional parameters and their values are, in general, presented as a character string,
optstr, of the form ‘
’; alphabetic characters can be supplied in either upper or lower case. Both
and
may consist of one or more tokens separated by white space. The tokens that comprise
will normally be either an integer, real or character value as defined in the description of the specific optional argument. In addition all optional parameters can take an
DEFAULT which resets the optional parameter to its default value.
It is imperative that optional parameter arrays are initialized before any options are set, before the relevant problem solving function is called and before any options are queried using
d01zlc.
To initialize the optional parameter arrays
iopts and
opts for a specific problem solving function, the option
Initialize is used with
identifying the problem solving function to be called. For example, to initialize the optional parameter arrays to be passed to
d01rac and its associated function
d01rcc,
d01zkc is called as follows:
nag_quad_opt_set("Initialize = d01rac", iopts, liopts, opts, lopts, &fail)
The available option names and their corresponding valid values are given in Section 11 in
d01esc and
d01rac.
None.
- 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 had an illegal value.
- NE_INT
-
On entry, .
Constraint: .
On entry, .
Constraint: .
- 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_INVALID_FORMAT
-
On entry, could not convert the specified to an integer: .
On entry, could not convert the specified to a real: .
On entry, the expected delimiter ‘
’ was not found in
optstr:
.
- NE_INVALID_OPTION
-
On entry, either the option arrays have not been initialized or they have been corrupted.
On entry, the optional parameter in
optstr was not recognized:
.
- NE_INVALID_VALUE
-
On entry, the supplied for the character optional parameter is not valid.
.
On entry, the supplied for the integer optional parameter is not valid.
.
On entry, the supplied for the real optional parameter is not valid.
.
- 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.
- NE_NOT_FUN_NAME
-
On entry, attempting to initialize the optional parameter arrays but specified function name was not valid: .
Not applicable.
Background information to multithreading can be found in the
Multithreading documentation.
Please consult the
X06 Chapter Introduction for information on how to control and interrogate the OpenMP environment used within this function. Please also consult the
Users' Note for your implementation for any additional implementation-specific information.
For suites of functions that share the same option arrays, the option arrays must be initialized using the primary (driver) function name. For example for functions
d01rac and
d01rcc, the option arrays must be initialized for
d01rac.
When encoding integer valued options in
optstr, the integer
must be written as an explicit integer. For example,
"Maximum Subdivisions = 12" is acceptable, whereas
"Maximum Subdivisions = 12.0" and
"Maximum Subdivisions = 0.12e2"
are not.
When encoding real valued options in
optstr, the
may be integral if appropriate. For example,
"Absolute Tolerance = 10",
"Absolute Tolerance = 10.0" and
"Absolute Tolerance = 1.0e1"
are all acceptable.
See the example programs associated with the problem solving function you wish to use for a demonstration of how to use d01zkc to initialize option arrays and set options.