The routine may be called by the names h02cgf or nagf_mip_iqp_sparse_optstr.
h02cgf may be used to supply values for optional parameters to h02cef. It is only necessary to call h02cgf for those arguments whose values are to be different from their default values. One call to h02cgf sets one argument value.
Each optional parameter is defined by a single character string of up to characters, consisting of one or more items. The items associated with a given option must be separated by spaces, or equal 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 real value. Such numbers may be up to contiguous characters in Fortran 77'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.
Normally, each user-specified option is printed as it is defined, on the current advisory message unit (see x04abf), but this printing may be suppressed using the keyword Nolist.
Thus the statement
Call h02cgf ('Nolist')
suppresses printing of this and subsequent options.
Printing will automatically be turned on again after a call to h02cef, and may be turned on again at any time using the keyword List.
Optional parameter settings are preserved following a call to h02cef, and so the keyword Defaults is provided to allow you to reset all the optional parameters to their default values
by the statement