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Re: Request for Collective Wisdom...

• To: mathgroup at smc.vnet.net
• Subject: [mg88588] Re: Request for Collective Wisdom...
• From: David Bailey <dave at Remove_Thisdbailey.co.uk>
• Date: Fri, 9 May 2008 03:24:39 -0400 (EDT)
• References: <fvpcoc$met$1@smc.vnet.net>

My tip would be to never make global assignments to 1-letter variables. 
These can so easily get re-used in other expressions and cause havoc. If 
you have an expression and you wish to substitute x=7, use:

expression /.x->7

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