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MathGroup Archive 2005

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Re: Clear subscripted variables

  • To: mathgroup at smc.vnet.net
  • Subject: [mg58292] Re: Clear subscripted variables
  • From: David Bailey <dave at Remove_Thisdbailey.co.uk>
  • Date: Sun, 26 Jun 2005 01:33:54 -0400 (EDT)
  • References: <d9ispk$cpd$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Mukhtar Bekkali wrote:
> Here is the code (x\_i stands for x subscript i):
> 
> Table[{Print[x\_i = i]; Clear[x]; Remove[x]; Unset[x]; Print[x\_i]},
> {i, 1, 2}]
> 
> I expected that x\_i is cleared at the end of the loop but it isn't
> 
> If I insert Clear[Subscript] in the loop then it is cleared, but not
> desirable since it clears all variables with subscripts.
> 
> What command shall I use to clear specific subscripted variables?
> 
> Mukhtar Bekkali
> 
Hi,

Try this:

Table[a\_i =. , {i, 1, 10}]

This is equivalent to the use of Unset[a\_i]

David Bailey
http://www.dbaileyconsultancy.co.uk


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