To supply individual optional parameters to
e04ucf/e04uca. More precisely,
e04uef must be used to supply optional parameters to
e04ucf and
e04uea must be used to supply optional parameters to
e04uca.
e04uea is a version of
e04uef that has additional arguments in order to make it safe for use in multithreaded applications (see
Section 5). The initialization routine
e04wbf must have been called before calling
e04uea.
e04uef/e04uea can also be used to supply individual optional parameters to
e04uff/e04ufa.
e04uef/e04uea may be used to supply values for optional parameters to
e04ucf/e04uca.
It is only necessary to call
e04uef/e04uea for those arguments whose values are to be different from their default values. One call to
e04uef/e04uea 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 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 real value. Such numbers may be up to 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
e04uef, each user-specified option is normally 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 e04uef ('Nolist')
suppresses printing of this and subsequent options. Printing will automatically be turned on again after a call to
e04ucf and may be turned on again at any time using the keyword
List.
For
e04uea printing is turned off by default, but may be turned on at any time using the keyword
List.
Optional parameter settings are preserved following a call to
e04ucf/e04uca 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
e04ucf/e04uca.
A complete list of optional parameters, their abbreviations, synonyms and default values is given in
Section 12 in
e04ucf/e04uca.
None.
Not applicable.
e04udf/e04uda may also be used to supply optional parameters to
e04ucf/e04uca.