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MathGroup Archive 2001

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Re: Memory Conservation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg29912] Re: Memory Conservation
  • From: "Orestis Vantzos" <atelesforos at hotmail.com>
  • Date: Wed, 18 Jul 2001 02:08:53 -0400 (EDT)
  • Organization: National Technical University of Athens, Greece
  • References: <9iomg8$i13$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

a) The main difference between Module and Block is just that; Module removes
all local variables.
b) If you do remove finalanswer, you will get a Removed[finalanswer]
expression instead of the required result.
Orestis
PS.If you want to save memory set $HistoryLength=0 before you use your
routine. Share[] helps too sometimes, but it will slow you down, if not used
smartly.


"Shane Frasier" <jsf9k at virginia.edu> wrote in message
news:9iomg8$i13$1 at smc.vnet.net...
> Hi,
>     I have a program in Mathematica that involves large matrices.  I want
to
> make sure that intermediate variables aren't wasting memory, so I have a
few
> questions:
>
> 1)  I have functions that look like
> Module[{i,j,final_answer},...Remove[i,j];final_answer].  Is Remove
necessary
> here, or do module variables cease to exist once the module ends?
>
> 2)  If it is necessary, is there any way to Remove final_answer too before
> the module ends?  In my case, the construction of final_answer is
> complicated, so I want to build it up in stages to avoid having a single,
> long and unreadable line of code.
>
> Thanks for your help,
> Shane Frasier
> jsf9k at virginia.edu
>
>
>




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