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Re: Confusion between rules and variables

• To: mathgroup at smc.vnet.net
• Subject: [mg42419] Re: [mg42416] Confusion between rules and variables
• From: Tomas Garza <tgarza01 at prodigy.net.mx>
• Date: Sun, 6 Jul 2003 06:57:02 -0400 (EDT)
• References: <200307050711.DAA19921@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Two possibilities:

x = x/.{x->0.543}

or
x = {x -> 0.543}[[1,2]]


Tomas Garza
Mexico City



----- Original Message ----- 
From: "Jonathan Greenberg" <greenberg at ucdavis.edu>
To: mathgroup at smc.vnet.net
Subject: [mg42419] [mg42416] Confusion between rules and variables


> I ran a FindRoot where the output was {x->0.543} -- How do I extact that
> value (0.543) for use in some other equation (e.g. How do I set a variable
> equal to 0.543, instead of that entire rule)?
>
> --j
>
>

• References:
  • Confusion between rules and variables
    • From: Jonathan Greenberg <greenberg@ucdavis.edu>