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MathGroup Archive 2005

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Re: Re: Asking questions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg58279] Re: Re: Asking questions
  • From: stephen layland <layland at wolfram.com>
  • Date: Sat, 25 Jun 2005 01:56:41 -0400 (EDT)
  • Mail-followup-to: Bharat Bhole <bbhole@gmail.com>, mathgroup@smc.vnet.net
  • References: <200506230642.CAA14625@smc.vnet.net> <200506240728.DAA00319@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

and thus spake Bharat Bhole [2005.06.24 @ 02:30]:
> 
> Suppose I am running a code
> MapThread[func,{Table[d,{d,1,10}]] which takes very long to evaluate for the
> entire list. Mathematica gives me the output ONLY after 'func[d]' has been
> evaluated for all d from 1 to 10.

That's because the kernel is only doing what you tell it to do.  The
matheamtica kernel is single threaded.  You will only 'get a result'
when the entire function has been evaluated.

> Is it possible to make Mathematica give
> the output as it is evaluating after each d. For example, is it possible to
> make it give output after it has evaluated func[1], then func[2] and so on.
> Thank you for your help.
You can get the kernel to Print[] the results as it maps like:

((Print[#]; #)&@f[#]) & /@ Range[10]

but this still won't allow you to use the results in the kernel until
the entire Map call has ended.

(unless, of course, you use another mathematica kernel). 

--
/*------------------------------*\
|        stephen layland         |
|    Documentation Programmer    |
| http://members.wri.com/layland |
\*------------------------------*/


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