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Re: Automatic update of variables

• To: mathgroup at smc.vnet.net
• Subject: [mg110332] Re: Automatic update of variables
• From: Bob Hanlon <hanlonr at cox.net>
• Date: Sun, 13 Jun 2010 04:12:57 -0400 (EDT)

b == Dynamic[3 a + 1]


Bob Hanlon

---- "Antonio De Ju=C3=A1rez" <adejuarez at gmail.com> wrote:

==========================
Sometimes, I would find useful a method to update variables
automatically. For example, given the delayed rule

b:==3 a+1;

it would be useful to have b updated whenever a is assigned a new
value, like a==37. Is there any method to do this in Mathematica?

Thanks,

   Antonio.