kernel crash with integrating the derivative of an
in [Mathematica]
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From: Leonid Shifrin on 12 Nov 2009 06:01 Hi Sjoerd, I do confirm the crash (M7.0, WinXp 32). The following seems to help: redefine your function to guard against non-numerical arguments as In[1] := Clear[sp1,x]; sp1[x_?NumericQ] = D[sp[x], x]; In[2]:= NIntegrate[sp1[x], {x, -9, 4}] Out[2]= 12.5726 Regards, Leonid On Wed, Nov 11, 2009 at 12:27 PM, Sjoerd C. de Vries < sjoerd.c.devries(a)gmail.com> wrote: > Hi all, > > The following leads to a consistent crash on my PC: > > 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}]. > > Same on yours? > > Cheers -- Sjoerd > >
From: Syd Geraghty on 12 Nov 2009 06:03 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(a)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}].
From: Herman Kuun on 12 Nov 2009 06:04 Nope. No crash. Mathematica-7.01 Linux 2.6.30-gentoo-r5 #3 SMP Wed Nov 11 11:22:10 SAST 2009 x86_64 AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ AuthenticAMD GNU/Linux Best Herman On Wed, Nov 11, 2009 at 11:27 AM, Sjoerd C. de Vries < sjoerd.c.devries(a)gmail.com> wrote: > Hi all, > > The following leads to a consistent crash on my PC: > > 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}]. > > Same on yours? > > Cheers -- Sjoerd > >
From: DrMajorBob on 12 Nov 2009 06:05 Yes, it crashes consistently here too, on my Intel iMac. $Version "7.0 for Mac OS X x86 (64-bit) (February 19, 2009)" $ReleaseNumber 1 Bobby On Wed, 11 Nov 2009 03:27:51 -0600, Sjoerd C. de Vries <sjoerd.c.devries(a)gmail.com> wrote: > Hi all, > > The following leads to a consistent crash on my PC: > > 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}]. > > Same on yours? > > Cheers -- Sjoerd > -- DrMajorBob(a)yahoo.com
From: DrMajorBob on 12 Nov 2009 06:06 I get a kernel crash and a beep, with the Front End unaffected. Bobby On Wed, 11 Nov 2009 13:49:21 -0600, Sjoerd C. de Vries <sjoerd.c.devries(a)gmail.com> wrote: > Hmmm, interesting. Syd Geraghty, also on a mac (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), only gets a system error. All the other responses I get report > similar > crashes. > > Cheers -- Sjoerd > >> -----Original Message----- >> From: DrMajorBob [mailto:btreat1(a)austin.rr.com] >> Sent: 11 November 2009 20:40 >> To: Sjoerd C. de Vries; mathgroup(a)smc.vnet.net >> Subject: Re: kernel crash with integrating the derivative of >> an Interpolation >> >> Yes, it crashes consistently here too, on my Intel iMac. >> >> $Version >> >> "7.0 for Mac OS X x86 (64-bit) (February 19, 2009)" >> >> $ReleaseNumber >> >> 1 >> >> Bobby >> >> On Wed, 11 Nov 2009 03:27:51 -0600, Sjoerd C. de Vries >> <sjoerd.c.devries(a)gmail.com> wrote: >> >> > Hi all, >> > >> > The following leads to a consistent crash on my PC: >> > >> > 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}]. >> > >> > Same on yours? >> > >> > Cheers -- Sjoerd >> > >> >> >> -- >> DrMajorBob(a)yahoo.com > -- DrMajorBob(a)yahoo.com
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