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R: Re: good list

  • To: mathgroup at
  • Subject: [mg125152] R: Re: good list
  • From: "Brambilla Roberto Luigi (RSE)" <Roberto.Brambilla at>
  • Date: Sat, 25 Feb 2012 01:52:55 -0500 (EST)
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Dear Alexej,
It works fine! 
Many thanks again, Roberto.

Myfunc involves a Cauchy Principal Value integral on a finite interval that often fails when applied to an interpolated function.

myfunc[x_]:=CauchyPrincipalValue[fo[u]/(u-x),{u,a,{x},b}] (*verMath5.1*)


-----Messaggio originale-----
Da: Alexei Boulbitch [mailto:Alexei.Boulbitch at] 
Inviato: gioved=EC 23 febbraio 2012 11.45
A: mathgroup at
Oggetto: Re: good list

Hi to all,

I have a function  myfunc[x] (of some complexity) and I want to build
the list of its values in the interval (a<=x<=b) with step



According to the input value, sometimes myfunc[x] is not able to give a
numeric result

(in my case a singular difficult numerical integral) . In others cases
it works fine.

My question is how to build the list with only the good cases.

Many thanks, Roberto

Hi, Roberto,

Try this:



Have fun, Alexei
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