| Re: the fastest way to find number of points in sphere(radius r) [message #46399] |
Tue, 22 November 2005 11:16  |
Xavier Llobet
Messages: 7
Registered: April 2005
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Junior Member |
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In article <1132683502.085584.295570@g14g2000cwa.googlegroups.com>,
"Ed Hyer" <ejhyer@gmail.com> wrote:
> Those are some pretty big numbers for this problem. I'm not sure even
> HISTOGRAM can get around that.
HISTOGRAM should be able to handle 3E5 elements: called once per sphere
center.
> If this is homework, forget about it,
> but if it's your dissertation, I think you'll likely end up calling
> these C routines: http://www.cs.umd.edu/~mount/ANN/
If it's dissertation-grade work, a month of CPU is not much. The work
can be divided in as many pieces as desired (results for each center are
completely independent), and if you can use 6 PC's, from 17:00 to 09:00
plus week-end you are done in less than a week. And this is a
calculation that you need to do only once, as there are no parameters to
vary.
_x.
--
Only one "o" in my address.
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