6 Aug
2008
6 Aug
'08
4:30 p.m.
Travis E. Oliphant a écrit :
fred wrote:
Hi,
Let's say I want to read a (binary) file which contains a nx*ny*nz array.
Is it possible to read a "sub-array" from this file, ie each block of (nx/4, ny/4, nz/4) for instance, without loading the whole file ?
An easy way to do this which forces the operating system to do the work of partial loading is to use a memory mapped file as the source of the array (i.e. a memmap array).
Then, selecting out a block is as simple as slicing. Maybe I had to mention this: the aim is to cut in several files a "large" data file, _bigger_ than total available memory amount.
Does memmap still apply ? Cheers, -- Fred