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MathGroup Archive 2006

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Re: Simple Plot3D/Function Syntax issue

  • To: mathgroup at smc.vnet.net
  • Subject: [mg68606] Re: Simple Plot3D/Function Syntax issue
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Fri, 11 Aug 2006 04:40:40 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <ebeb66$ldv$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

JTolman wrote:
> When I enter
> f = e^-(x^2 + y^2) (x^2 + 2y^2)
> It gives me a syntax::noinfo error but the output looks like the
> correct textbook style function.
> 
> Also, when I try to plot it
> Plot3D[e^-(x^2 + y^2) (x^2 + 2y^2), {x, -3, 3}, {y, -3, 3}]
> It of course gives me not machines-size real number errors, which I am
> assuming have more to do with my original syntax error.  I've tried
> several variations but can't figure out what needs to be corrected.
> 
	
The Mathematica Book --> Mathematica Reference Guide --> Some General 
Notations and Conventions --> A.3.1 Function Names:

"The names of built-in functions follow some general guidelines.

â?¢ The name consists of complete English words, or standard mathematical 
abbreviations. American spelling is used.
â?¢ The first letter of each word is capitalized.
â?¢ Functions whose names end with Q usually "ask a question", and return 
either True or False.
â?¢ Mathematical functions that are named after people usually have names 
in Mathematica of the form PersonSymbol."

http://documents.wolfram.com/mathematica/book/section-A.3.1

HTH,
Jean-Marc


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