Re: [Numpy-discussion] Writing arrays to files.

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"Andrea" == Andrea Riciputi writes:

Andrea> Hi, I need a little help here. I need to write some Andrea> Numeric arrays (coming from some simulations) to ASCII Andrea> files. I'm sure it's a well known topic and I'd be happy Andrea> not to have to reinvent the wheel. I've both 1-dim and Andrea> 2-dim arrays and I'd like to get something like this: Andrea> - 1-dim array ASCII file: Andrea> 0.1 0.2 0.3 etc... If your array is not monstrously large, and you can do it all in memory, do fh = file('somefile.dat', 'w') s = ' '.join([str(val) for val in a]) fh.write(s) where a is your 1D array Andrea> - 2-dim array ASCII file: Andrea> 0.1 0.2 0.3 0.4 0.5 0.6 etc.... Andrea> How can I get them? Same idea fh = file('somefile.dat', 'w') for row in a: s = ' '.join([str(val) for val in row]) fh.write('%s\n' % s) where a is your 2D array The scipy module also has support for reading and writing ASCII files. Note if you are concerned about efficiency and are willing to use binary files, use the fromstring and tostring methods. JDH