On Sun, May 17, 2009 at 8:51 AM, Charles R Harris <charlesr.har...@gmail.com > wrote:
> Hi Glen, > > On Sat, May 16, 2009 at 11:24 PM, Glenn Tarbox, PhD <gl...@tarbox.org>wrote: > >> Today at Sage Days we tried slices on a few large arrays (no mmap) and >> found that slicing breaks on arrays somewhere between 2.0e9 and 2.5e9 >> elements. The failure mode is the same, no error thrown, basically nothing >> happens >> >> This was on one of the big sage machines. I don't know the specific OS / >> CPU but it was definitely 64 bit and lots of available memory etc. >> > > Can you try slicing with an explicit upper bound? Something like a[:n] = 1, > where n is the size of the array. > And maybe some things like a[n:n+1] = 1, which should only set a single element and might save some time ;) Chuck
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