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State(3)	      User Contributed Perl Documentation	      State(3)

       State - A package to keep track of plotting commands

	 use PDL::Graphics::State;

       This is a very simple, at present almost	trivial, package to keep track
       of the current set of plotting commands.

       You create a new	object by calling the "new" operator

	 $state	= PDL::Graphics::State->new();

       Then for	each new command you call "add"	on this	object so that for a
       call to "line" of the form

	 line $x, $y, $opt;

       the call	to "add" would be like

	 $state->add(\&line, 'line', [$x, $y], $opt);

       which is	stored internally as:

	 [\&line, 'line', [$x, $y], $opt]

       The state can later be extracted	using "get" which returns the state
       object which is an array	of anonymous arrays like the one above where
       the first object	is a reference to the function,	the second an
       anomymous array of arguments to the function and	finally	an anonymous
       hash with options to the	command.

       If you know the order in	which you inserted commands they can be
       removed by calling "remove" with	the number in the stack. No further
       interaction is implemented except "clear" which clears the stack	and
       "copy" which returns a "deep" copy of the state.

       Jarle Brinchmann	( after some prodding by Karl

       All rights reserved. There is no	warranty. You are allowed to
       redistribute this software / documentation under	certain	conditions.
       For details, see	the file COPYING in the	PDL distribution. If this file
       is separated from the PDL distribution, the copyright notice should be
       included	in the file.

perl v5.32.1			  2018-05-05			      State(3)


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