h23r.html

Function: disremember - produce procedure without option remember.

Calling Sequences:

disremember(P);

disremember(P,x);

Parameters:

P - procedure.

x - anything.

Description:

This function can be useful when Maple's memory usage increases abnormally, due to results being added to the remember table of a procedure that has option remember . See sniffmem for a way to tell which procedures have large remember tables.
The result of disremember may be assigned back to the name of the original procedure. From this time on, no additional results will be automatically added to the remember table. Or the result may be assigned to a different name, resulting in two distinct procedures.
In the first syntax, disremember(f) , the remember table of the result is a copy of that of the original procedure. In the second syntax, disremember(f,x) , the remember table of the result is cleared. Another way to delete a remember table is with forget . However, forget(f) deletes the table of f itself instead of returning a new procedure.
Caution is needed when using disremember on Maple's own procedures, as some of them may need option remember in order to work properly.
This function is part of the Maple Advisor Database.

Examples

Define a procedure having option remember .

> F:= proc(x) option remember; x^2+1 end;

Produce some values in its remember table.

> F(1),F(2),F(3):
op(4,eval(F));

Here is a version without option remember , but with the existing remember table entries.

> G:= disremember(F);

> op(4,eval(G));

These remember tables are separate: adding or changing an entry in one won't change the other.

> F(1):= foo: G(1):= goo:
op(4,eval(G)); op(4,eval(F));

Here's another version with no remember table.

> H:= disremember(F,0);

> op(4,eval(H));

Not having a remember table allows H to be executed under evalhf .

> evalhf(H(1));

> evalhf(F(5));

Error, remember tables are not supported in evalhf

Maple Advisor Database R. Israel, 1999