[Numpy-discussion] odd ascii format and genfromtxt

Ralf Gommers ralf.gommers@googlemail....
Fri Feb 26 00:50:54 CST 2010


Hi all,

I'm trying to read in data from text files with genfromtxt, and have some
trouble figuring out the right combination of keywords. The format is:

['0\t\t4.000000000000000e+007,0.000000000000000e+000\n',
 '\t9.860280631554179e-001,-1.902586503306264e-002\n',
 '\t9.860280631554179e-001,-1.902586503306264e-002']

Note that there are two delimiters, tab and comma. Also, the first line has
an extra integer plus tab (this is a repeating pattern). The files are
large, there's a lot of them, and they're generated by a binary I can't
modify.

Here are some things I've tried:

In [216]: np.genfromtxt('ascii2test.raw', invalid_raise=False)
Out[216]: array([  0.,  NaN])

In [217]: np.genfromtxt('ascii2test.raw', invalid_raise=False,
delimiter=['\t', ','])
TypeError: cannot perform accumulate with flexible type

In [228]: np.genfromtxt('ascii2test.raw', delimiter=['\t', ','],
dtype=[('intvar', '<i8'), ('fltvar', '<f8'), ('fltvar2', '<f8')])
TypeError: cannot perform accumulate with flexible type


Any suggestions?

Thanks,
Ralf
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