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Re: kernel crash with integrating the derivative of an

• To: mathgroup at smc.vnet.net
• Subject: [mg104866] Re: [mg104833] kernel crash with integrating the derivative of an
• From: Syd Geraghty <sydgeraghty at me.com>
• Date: Thu, 12 Nov 2009 06:03:01 -0500 (EST)
• References: <200911110927.EAA29333@smc.vnet.net>

Hi Sjoerd,

I do not get a system problem but the error:

NIntegrate::inumr: The integrand sp1[x] has evaluated to non-numerical values for all sampling points in the region with boundaries {{-9,4}}. >>


Cheers .... Syd

Syd Geraghty B.Sc, M.Sc.

sydgeraghty at mac.com

Mathematica 7.0.1.0 for Mac OS X x86 (64 - bit) (12th September 2009)
MacOS X V 10.6.1 Snow LeopardMacBook Pro 2.33 GHz Intel Core 2 Duo  2GB RAM





On Nov 11, 2009, at 1:27 AM, Sjoerd C. de Vries wrote:

> tbl =
> {{3.7372349521625203`, 7.8999536564180906`}, {-1.5683136806862397`,
>   3.549628027104541`}, {-9.326537784015741`, -5.7268546790245844`},
> {-6.8805945246545`, 6.849090400951159`}}
> 
> sp = Interpolation[tbl, Method -> "Spline"];
> 
> sp1[x_] = D[sp[x], x];
> 
> NIntegrate[sp1[x], {x, -9, 4}].

• References:
  • kernel crash with integrating the derivative of an Interpolation
    • From: "Sjoerd C. de Vries" <sjoerd.c.devries@gmail.com>