Re: Interpolation -> segfault?
- To: mathgroup at smc.vnet.net
- Subject: [mg98270] Re: Interpolation -> segfault?
- From: oshaughn at gravity.psu.edu
- Date: Fri, 3 Apr 2009 20:12:21 -0500 (EST)
- References: <firstname.lastname@example.org> <email@example.com>
On Apr 1, 3:50 pm, Jens-Peer Kuska <ku... at informatik.uni-leipzig.de> wrote: > Hi, > > your InterpolationFunction cause the kernel crash and it would helpful > to find out where it come from .. > > The input seems to be nonsense and it is no wonder that the kernel > crashes. > Nonsensical? It's a standard InterpolatingFunction object. I don't know what you mean. The function is made by (1) using FunctionInterpolation on a very complicated, slow-to-evaluate expression to create an object f1; (2) wrapping it with If[#1<... || #1> ..., 0, fn]; and then (3) using 'Save'. That'sit. The original function, before saving, does evaluate fine: I've used it to create other data products (e.g., with NIntegrate). Just hangs when restoring it. Also, I recently discovered that the function as above works fine if you manually change only a few of the very small numbers (10^(-316) !) to 0. And, going back to the original code, adding 'Chop' before I do the FunctionInterpolation yields an object that saves and restores without trouble. I therefore *strongly suspect* this is an issue pertaining to the precision with which the object was saved.