On Sun, Nov 2, 2008 at 4:35 PM, mabshoff <[EMAIL PROTECTED]> wrote: > > On Nov 2, 2:12 pm, Daniel Allcock <[EMAIL PROTECTED]> wrote: > > Hi Daniel, > >> Hi all, just got started with SAGE and I hope someone has a suggestion >> for me. I have a .sage file defining a big list of approx 170,000 4x4 >> matrices with rational number entries, which I will want SAGE to do >> various things to. It takes SAGE 4-5 minutes to read in the file >> (which was produced by a C++ program), and surely this can be >> improved.
How are you reading it in? > > Probably. > >> I assumed that loading it into memory and then writing it to a .sobj >> file would give me something more manageable. Good idea. >> But I get memory >> allocation errors: >> >> python(2102) malloc: *** vm_allocate(size=8421376) failed (error >> code=3) >> python(2102) malloc: *** error: can't allocate region >> python(2102) malloc: *** set a breakpoint in szone_error to debug >> >> Presumably the system has just run out of memory. That's what the above error message says. But it could be caused by some bug... > This surprises me >> since the .sage file is only 12MB, and the .py file it creates is >> 37MB. The matrix entries are all small, numerators <10,000 and >> denominators < 200 or so. I'm working on a MacBook Pro with 2GB RAM, >> and the machine didn't have any other substantial load. That doesn't sound so hard. >> I will need only one matrix at a time, so there should be no need to >> load in all of them at once. But poking around in SAGE and python >> docs hasn't shown me any simple way to, say, read in and execute a >> single line from some file. >> >> Thanks for your help, >> Daniel > > Which version of Sage do you run? > > Can you post the code so I can attempt to reproduce the problem? > > Cheers, > > Michael > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
