[SciPy-user] partially reading a file [corollary]

[fred]

Now, let's say I have scatter data in a big binary file (stored in the 
form (xi, yi, zi, vi)), like on the snapshot, showing a "small" scatter.

How can I cut the scatter efficiently in several files, as in the 
previous mail ?

I can use memmap to "read" the whole file, but after ?
It's more a algorithmic issue from my own point of view.

TIA.

Cheers,

-- 
Fred
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