Re: Preventing NIntegrate from reevaluating after DumpSave and Get
- To: mathgroup at smc.vnet.net
- Subject: [mg68817] Re: Preventing NIntegrate from reevaluating after DumpSave and Get
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Sat, 19 Aug 2006 00:41:43 -0400 (EDT)
- References: <ec3ps8$2c2$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
you must remove the NIntegrate[] calls *before* you make the dump-save.
Or, just an idea
Block[{NIntegrate},
NIntegrate[any__]:=Indeterminate
Get["MyFile.mx"]
]
overwrite temporal NIntegrate[]
Regards
Jens
Chris Rodgers wrote:
> Hi,
>
> I have been running a computation in Mathematica which attempts to
> NIntegrate[myformula,{t,0,infinity}] for many different model parameters.
>
> The results are in a large list. e.g.
> resultslist = {0, 7, 13.33,
> NIntegrate[myformula_at_tricky_parameter_vals,{t,0,infinity}],11,2,...}
>
> Notice that sometimes NIntegrate does not converge for particular model
> parameters.
>
> At the end of a long-running batch job, I DumpSave this results list.
>
> Now, my question is this:
>
> When I load the results back into Mathematica and try to use them things
> are very slow. I suspect that this is because Mathematica retries
> evaluating all the NIntegrate[...] on which it got stuck the first time
> around.
>
> I have tried e.g.
>
> Get["MyFile.mx"]
>
> sanelist = resultslist /. NIntegrate[___]->NotANumber
>
> but this also takes ages evaluating the NIntegrate[...].
>
> Is there an easy way to load the .mx file and eliminate any of the
> non-converged NIntegrate[...] entries without having to wait for them to
> all be evaluated another time?
>
> Many thanks in advance,
>
> Chris Rodgers.
>