nag_opt_nlp2_option_integer_set (e04wg) may be used to supply individual integer optional parameters to nag_opt_nlp2_solve (e04wd). The initialization function nag_opt_nlp2_init (e04wc) must have been called before calling nag_opt_nlp2_option_integer_set (e04wg).

Syntax

[iw, rw, ifail] = e04wg(string, ivalue, iw, rw)

[iw, rw, ifail] = nag_opt_nlp2_option_integer_set(string, ivalue, iw, rw)

Description

nag_opt_nlp2_option_integer_set (e04wg) may be used to supply values for integer optional parameters to nag_opt_nlp2_solve (e04wd). It is only necessary to call nag_opt_nlp2_option_integer_set (e04wg) for those arguments whose values are to be different from their default values. One call to nag_opt_nlp2_option_integer_set (e04wg) sets one argument value.

Each integer optional parameter is defined by a single character string in string and the corresponding value in ivalue. For example, the following allows the iteration limit to be defined:

itnlim = 1000;
if (m > 500)
  itnlim = 500;
end
[iw, rw, ifail] = e04wg('Iterations', itnlim, iw, rw);

Optional parameter settings are preserved following a call to nag_opt_nlp2_solve (e04wd) 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 nag_opt_nlp2_solve (e04wd).

A complete list of optional parameters, their abbreviations, synonyms and default values is given in Optional Parameters in nag_opt_nlp2_solve (e04wd).

References

None.

Parameters

Compulsory Input Parameters

1: $string$ – string: A single valid keyword of an integer optional parameter (as described in Optional Parameters in nag_opt_nlp2_solve (e04wd)).
2: $ivalue$ – int64int32nag_int scalar: An integer value associated with the keyword in string.
3: $iw (:)$ – int64int32nag_int array: The dimension of the array iw must be at least $leniw$ (see nag_opt_nlp2_init (e04wc))
4: $rw (:)$ – double array: The dimension of the array rw must be at least $lenrw$ (see nag_opt_nlp2_init (e04wc))

Optional Input Parameters

None.

Output Parameters

1: $iw (:)$ – int64int32nag_int array: The dimension of the array iw will be $leniw$ (see nag_opt_nlp2_init (e04wc))
2: $rw (:)$ – double array: The dimension of the array rw will be $lenrw$ (see nag_opt_nlp2_init (e04wc))
3: $ifail$ – int64int32nag_int scalar: $ifail = 0$ unless the function detects an error (see Error Indicators and Warnings).

Error Indicators and Warnings

Errors or warnings detected by the function:

$ifail = 1$: The initialization function nag_opt_nlp2_init (e04wc) has not been called.

$ifail = 2$: The supplied option is invalid. Check that the keywords are neither ambiguous nor misspelt.

$ifail = - 99$: An unexpected error has been triggered by this routine. Please contact NAG.

$ifail = - 399$: Your licence key may have expired or may not have been installed correctly.

$ifail = - 999$: Dynamic memory allocation failed.

Accuracy

Not applicable.

Further Comments

nag_opt_nlp2_option_string (e04wf) may also be used to supply integer optional parameters to nag_opt_nlp2_solve (e04wd).

Example

Open in the MATLAB editor: e04wg_example

function e04wg_example


fprintf('e04wg example results\n\n');

string = 'Major iterations limit';
itmax = int64(50);

% Initialize
[iw, rw, ifail] = e04wc;
% Set option
[iw, rw, ifail] = e04wg( ...
                         string, itmax, iw, rw);
% Get option value
[ivalue, iw, rw, ifail] = e04wk( ...
                                 string, iw, rw);

fprintf('%s has been set to %5d\n', string, ivalue);

e04wg example results

Major iterations limit has been set to    50

PDF version (NAG web site, 64-bit version, 64-bit version)

Chapter Contents

Chapter Introduction

NAG Toolbox