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Re: Problem with parallel evaluation of integrals depending on a

  • To: mathgroup at smc.vnet.net
  • Subject: [mg99913] Re: Problem with parallel evaluation of integrals depending on a
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 19 May 2009 06:44:45 -0400 (EDT)
  • References: <guqv83$a4n$1@smc.vnet.net>

Hi,

and have you shared the definition of F[] with the
second kernel ?

Regards
   Jens

Alan Barhorst wrote:
> Hello, I am hoping someone can help me.  I am trying to pass something 
> like:
> 
> G[s_]:=Integrate[F[x],{x,0,S}]
> NIntegrate[G[s],{s,0,1}]
> 
> to parallel kernels.  The operation is successful in the base kernel 
> but fails in the other kernels due to the interior integral not being 
> evaluated.  The error is as follows.
> 
> NIntegrate::"inumr" :  "The integrand (   SubsuperscriptBox[ =E2=88=A7 , 0 , 
> \
>   S ] Sin[ SubscriptBox[ =CF=86$10572 ,  11 ]\   SubscriptBox[ =CF=88$10572 ,  
> 11 ] [x]] \
> =C2=AE=EF=A1=BFx  )    SubscriptBox[\"F$10572\", \"1\"] [S] has evaluated to non-
> numerical \
> values for all sampling points in the region with boundaries {{0, 1}}."
> 
> For some reason the upper bound of the interior integral is not 
> replaced with the grid points on {0,1} in the parallel evaluation.  I 
> have Distributed the global variable definitions to the kernels after 
> the function G[s] have been defined.
> 
> I have tried several things to break this loose but have been 
> unsuccessful.  Any pointers are appreciated.
> 
> 
> AB
> ________________________________________________________
> Alan A. Barhorst, PhD, PE	        | alan.barhorst at ttu.edu
> Professor					| http://www.me.ttu.edu/
> Mechanical Engineering		| Phone: 806-742-3563, ext 241
> Texas Tech University
> Lubbock, TX 79409-1021	
> 
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