Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2012

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: FindRoot and parameters in NIntegrate

  • To: mathgroup at smc.vnet.net
  • Subject: [mg124518] Re: FindRoot and parameters in NIntegrate
  • From: danl at wolfram.com
  • Date: Sun, 22 Jan 2012 07:25:21 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jfe3jq$a16$1@smc.vnet.net>
  • Reply-to: comp.soft-sys.math.mathematica at googlegroups.com

(1) Only let the NIntegrate work when parameters have numeric values.

(2) Specify a finite AccuracyGoal so as to avoid messages about trouble with the result and error estimates.

In[272]:= 
integ[a_?NumericQ, b_?NumericQ] := 
 NIntegrate[a + b x, {x, 0, 1}, AccuracyGoal -> 10]

In[273]:= FindRoot[{1 + a + b, integ[a, b]}, {{a, 0}, {b, 0}}]

Out[273]= {a -> 1., b -> -2.}

Daniel Lichtblau
Wolfram Research



  • Prev by Date: Re: MatrixForm odd behaviour
  • Next by Date: Latex with statement numbers
  • Previous by thread: Re: FindRoot and parameters in NIntegrate
  • Next by thread: Re: FindRoot and parameters in NIntegrate