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MathGroup Archive 2005

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Re: Re: Help for an integral

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57312] Re: [mg57274] Re: Help for an integral
  • From: "Frank M" <frankm60606 at gmail.com>
  • Date: Tue, 24 May 2005 05:12:51 -0400 (EDT)
  • Reply-to: <frankm60606 at gmail.com>
  • Sender: owner-wri-mathgroup at wolfram.com

Most integrals of e^-x^2 should resolve out to a function of the cumulative
standard normal distribution. This has many simple 5-7 term algebraic
approximations, although you are right there is not close form or analytic
solution. Is there a way to force Mathematica to use this in a solution? I
ask because I want to develop the standard models using Mathematica and then
branch out into non-standard models.

Frank
Chicago, IL

-----Original Message-----
From: meznaric [mailto:meznaric at gmail.com]
To: mathgroup at smc.vnet.net
Subject: [mg57312] [mg57274] Re: Help for an integral


Not even simple e^-x^2 can be integrated exactly between finite
intervals. You could try writing a function of a that will return a
numerical value of the integral (just use NIntegrate).

Sebastjan


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