Основы Maple

Robert M. Corless
Department of Applied Mathematics
University of Western Ontario
London, Canada

Copyright 2001 by Robert M. Corless
All rights reserved

Programming in Maple

Программирование в Maple

Local vs. global vs. environment variables

Локальные - глобальные - текущие переменные

Environment variables

Текущие переменные

> restart;

>fu := proc( x ) bah( x ); EnvMyJunk := 3; bah( x ); end proc:

>bah := proc( y )
if type(_EnvMyJunk,posint) and _EnvMyJunk=5 then
WARNING( "It's 5, I tell you!" )
elif type(_EnvMyJunk,posint) and _EnvMyJunk=3 then
WARNING( "Look out, it's 3!" )
else
WARNING( "Everything's cool, it's not 3." )
end if;
end proc:

> _EnvMyJunk := 5;

>fu( blort );

Warning, It's 5, I tell you!

Warning, Look out, it's 3!

> _EnvMyJunk;

> restart;

>p := x^3 + x + 1;

>alias( alpha=RootOf(p,x) );

> residue( 1/p, x=alpha );

> series( 1/p, x=alpha, 2 );

> Testzero := x -> evalb(Normalizer(x)=0);

> Normalizer := x -> normal(simplify(x));

> series( 1/p, x=alpha, 2 );

> forget( series );

> series( 1/p, x=alpha, 2 );

> residue( 1/p, x=alpha );

> forget( residue );

> residue( 1/p, x=alpha );

С официального разрешения © 2002 Waterloo Maple, Inc