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MathGroup Archive 2005

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Re: How does NIntegrate suppress messages?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg62461] Re: How does NIntegrate suppress messages?
  • From: "Andrew Moylan" <andrew.moylan at anu.edu.au>
  • Date: Fri, 25 Nov 2005 02:24:59 -0500 (EST)
  • References: <dm1b0v$ic1$1@smc.vnet.net> <dm499k$srh$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

It's quite a mystery. My guess is that NIntegrate temporarily redefines the 
Message[...] function.

Personally, I want to know because I want to copy this behaviour of 
NIntegrate for my own functions, if it is easy. Often I write code that uses 
Check, and I don't want the messages generated and appearing as errors and 
clogging up the output.

"Alan" <info at optioncity.REMOVETHIS.net> wrote in message 
news:dm499k$srh$1 at smc.vnet.net...
>
> "Andrew Moylan" <andrew.moylan at anu.edu.au> wrote in message
> news:dm1b0v$ic1$1 at smc.vnet.net...
>> Whenever the integrand in NIntegrate generates messages (by calling
>> Message), the output of these messages are suppressed, although they are
>> still generated in the sense that they can be caught using Check. Does
>> anyone know how NIntegrate does this?
>
> I don't, but your post answers a question of mine about behavior which
> has always seemed a puzzle. Often I will wrap a complicated
> computation in a Check in order to Abort[] on any message. Then, I
> will sometimes get an Abort[], but no message! And, indeed, often
> an NIntegrate is involved. When that occurs, I have never been able to
> re-write the code to retrieve those missing messages.
> So if there is a way to "unsuppress", that will be helpful to me, too.
>
> regards,
> alan
>
> 



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