Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2012

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Using Table and ignoring all errors and warnings?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg125684] Re: Using Table and ignoring all errors and warnings?
  • From: A Retey <awnl at gmx-topmail.de>
  • Date: Thu, 29 Mar 2012 02:55:46 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jkunci$aqk$1@smc.vnet.net>

Hi,

> I would like to use Table function, but have it ignore any errors or
> warnings and skip that value if one is produced.
>
> Illustrative Example:
>
> Table[1/i, {i, -3, 2}] Power::infy: Infinite expression 1/0
> encountered.>> {-(1/3), -(1/2), -1, ComplexInfinity, 1, 1/2}
>
> I would like the output to just be
>
> {-(1/3), -(1/2), -1, 1, 1/2}
>
> with no errors/warnings given as messages and the index that would
> produce a message to just be ignored. It's not just specific to 1/0
> error, but any type of error or warning I want it to ignore it and
> skip to the next value; with the final output being a list of valid
> answers according to expr.
>
> Is there a way to do that? Thanks!

There might be plenty, especially because your specification isn't that 
precise :-)

Here is one version which works for your example:

Quiet[Table[Check[1/i, Unevaluated[Sequence[]]], {i, -3, 2}]]


hth,

albert





  • Prev by Date: Re: Using Table and ignoring all errors and warnings?
  • Next by Date: Re: Using Table and ignoring all errors and warnings?
  • Previous by thread: Re: Using Table and ignoring all errors and warnings?
  • Next by thread: Re: Using Table and ignoring all errors and warnings?