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Message from discussion Efficient processing of large nuumeric data file
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David Sanders  
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 More options Jan 19 2008, 10:36 am
Newsgroups: comp.lang.python
From: David Sanders <dpsand...@gmail.com>
Date: Sat, 19 Jan 2008 07:36:29 -0800 (PST)
Local: Sat, Jan 19 2008 10:36 am
Subject: Re: Efficient processing of large nuumeric data file
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On Jan 18, 11:15 am, David Sanders <dpsand...@gmail.com> wrote:

> Hi,

> I am processing large files of numerical data.  Each line is either a
> single (positive) integer, or a pair of positive integers, where the
> second represents the number of times that the first number is
> repeated in the data -- this is to avoid generating huge raw files,
> since one particular number is often repeated in the data generation
> step.

> My question is how to process such files efficiently to obtain a
> frequency histogram of the data (how many times each number occurs in
> the data, taking into account the repetitions).  My current code is as
> follows:

Many thanks to all for the very detailed and helpful replies.  I'm
glad to see I was on the right track, but more happy to have learnt
some different approaches.

Thanks and best wishes,
David.


 
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