Re: NIntegrate and the number of grid points used
- To: mathgroup at smc.vnet.net
- Subject: [mg72794] Re: NIntegrate and the number of grid points used
- From: Peter Pein <petsie at dordos.net>
- Date: Sat, 20 Jan 2007 02:52:34 -0500 (EST)
- References: <eopn5h$rv8$1@smc.vnet.net>
Thomas Schmelzer schrieb: > Hoi zame, > > I am using NIntegrate to run a few experiments. I wonder whether there is a > possibility to get access to the number of points used by Mathematica? That > would be helpful. > > Thomas > > Hi Thomas, NIntegrateWithCount[exp_, rg_, opt___] := Module[{cnt = 0}, {NIntegrate[exp, rg, EvaluationMonitor :> cnt++, opt], cnt}]; NIntegrateWithCount[Sin[x]/(Pi - x), {x, 0, Pi}] --> {1.8519370519824667, 11} NIntegrateWithCount[Sin[x]/(Pi - x), {x, 0, Pi}, WorkingPrecision -> 32] --> {1.8519370519824661703611, 21} see http://documents.wolfram.com/mathematica/book/section-3.9.10 or read this chapter in Mathematica's help browser. Peter