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Arg[z] that works with zero argument?

• To: mathgroup at smc.vnet.net
• Subject: [mg50860] Arg[z] that works with zero argument?
• From: AES/newspost <siegman at stanford.edu>
• Date: Fri, 24 Sep 2004 04:41:35 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

I'd like a simple Arg[z] function that would "work" [return some simple 
value; zero is OK] for zero argument values, even if z is a list.

My simplest kludge so far is

    myArg[z_] := Module[{eps=10^(-17)}, Arg[z+eps]]

Seems to work OK so far -- better ways to do this?

• Follow-Ups:
  • Re: Arg[z] that works with zero argument?
    • From: "Maxim A. Dubinnyi" <maxim@nmr.ru>