[Numpy-discussion] "ValueError: total size of new array must be unchanged" only on Windows
Mon Feb 6 10:41:19 CST 2012
On Sun, Feb 5, 2012 at 10:41 AM, Paolo <email@example.com> wrote:
> I solved using 'rb' instead of 'r' option in the open file task.
> that would do it, if it's binary data, but you might as well so it
> readlines is giving you a list of the data, as separated by newline
charactors ("\n") -- it was broken on Windows, because opening the file in
text mode translated Windows newlines ("\r\n") to *nix style ones --
opening it in binary fixed that, but why use readlines at all? That's for
text -- use read. However, even better is to use fromfile(), which creates
an array form binary data in a file without puttin git in a string, first:
> matrix = np.fromfile(f, dtype=np.int16)
by the way -- be careful of endian issues here -- if you are moving data
among different machines. You could specify the endian-ness, for instance:
dt = numpy.dtype('<i2')
for a 16 bit little-endian integer.
Christopher Barker, Ph.D.
Emergency Response Division
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