: the name of the file which specifies the optional argument values. If stdin
is to be used, the string "stdin"
should be supplied. The set of option values must be preceded by the keyword begin
followed by the function name for which the set of options is being supplied. The function name may be the six character NAG name of an optimization function or its associated long name.
Each option value specified in the file must be preceded by the name of the optional argument. The argument name and value must be separated by at least one blank space or an equals symbol. nag_opt_read (e04xyc) will read to the end of file or until the keyword end is found or until another begin is found. C style comments may be placed within a set of option values to aid your documentation. Outside the option value sets, text need not be within C style comment delimiters.
Note: assignment to function pointers in the options structure, memory allocation to array pointers and assignment of trailing array dimensions cannot be performed from an options file. These must be assigned directly to the options structure in your calling program.