nag_opt_lsq_gencon_deriv_option_string (e04ur) may be used to supply values for optional parameters to nag_opt_lsq_gencon_deriv (e04us). It is only necessary to call nag_opt_lsq_gencon_deriv_option_string (e04ur) for those arguments whose values are to be different from their default values. One call to nag_opt_lsq_gencon_deriv_option_string (e04ur) sets one argument value.

Each optional parameter is defined by a single character string, of up to

72

characters, 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 $16$ contiguous characters in Fortran's I, F, E or D formats, terminated by a space if this is not the last item on the line.

Blank strings and comments are ignored. A comment begins with an asterisk (*) and all subsequent characters in the string are regarded as part of the comment.

For nag_opt_lsq_gencon_deriv_option_string (e04ur), each user-specified option is normally printed as it is defined, on the current advisory message unit (see nag_file_set_unit_advisory (x04ab)), but this printing may be suppressed using the keyword Nolist. Thus the statement

[lwsav, iwsav, rwsav, inform] = e04ur('Nolist', lwsav, iwsav, rwsav);

suppresses printing of this and subsequent options. Printing will automatically be turned on again after a call to nag_opt_lsq_gencon_deriv (e04us) and may be turned on again at any time using the keyword List.

Optional parameter settings are preserved following a call to nag_opt_lsq_gencon_deriv (e04us) 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_lsq_gencon_deriv (e04us).

A complete list of optional parameters, their abbreviations, synonyms and default values is given in Optional Parameters in nag_opt_lsq_gencon_deriv (e04us).

References

None.

Parameters

Compulsory Input Parameters

1: $str$ – string: A single valid option string (as described in Description and in Optional Parameters in nag_opt_lsq_gencon_deriv (e04us).
2: $lwsav (120)$ – logical array
3: $iwsav (610)$ – int64int32nag_int array
4: $rwsav (475)$ – double array: The arrays lwsav, iwsav and rwsav must not be altered between calls to any of the functions nag_opt_lsq_gencon_deriv_option_string (e04ur), nag_opt_lsq_gencon_deriv_option_string (e04ur).

Optional Input Parameters

None.

Output Parameters

1: $lwsav (120)$ – logical array
2: $iwsav (610)$ – int64int32nag_int array
3: $rwsav (475)$ – double array
4: $inform$ – int64int32nag_int scalar: Contains zero if a valid option string has been supplied and a $value > 0$ otherwise (see Error Indicators and Warnings).

Error Indicators and Warnings

$inform = 5$: The supplied option is invalid. Check that the keywords are neither ambiguous nor misspelt.

Accuracy

Not applicable.

Further Comments

None.

Example

Open in the MATLAB editor: e04ur_example

function e04ur_example


fprintf('e04ur example results\n\n');

infbd = 1e25;
string = sprintf('Infinite Bound Size = %9.1e',infbd);

% Initialize
[cwsav,lwsav,iwsav,rwsav,ifail] = e04wb( ...
                                         'e04us');
% Put listing on
[lwsav, iwsav, rwsav, inform] = e04ur( ...
                                       'List', lwsav, iwsav, rwsav);
[lwsav, iwsav, rwsav, inform] = e04ur( ...
                                       string, lwsav, iwsav, rwsav);

e04ur example results



 Calls to E04URA
 ---------------

      List
      Infinite Bound Size =   1.0e+25

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

Chapter Contents

Chapter Introduction

NAG Toolbox