Re: [Numpy-discussion] how-to "put" RAM-based numarray into memmap

Sebastian Haase wrote:

Hi, Suppose I have a 500MB-ram Computer and a 300MB ram-only (standard) numarray. Now I would like to "save" that onto harddrive (with a small header up front

How about:

f = open(filename, 'wb') f.write(MyHeader) A.tofile(f)

To read it back in, you need to know where your header ends, by either parsing it or using one of the same size every time, then you can use fromfile() to create an array form it.

NOTE: I havn't actaully done this myself, but I've done something bvery similar with fromstring and tostring with Numeric. I'm very happy that Numarray has the *file methods, as they don't require an extra copy in memory.

-Chris