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File/Folder	Size	Actions
__init__.cpython-37.opt-1.pyc	1.61 KB	Del OK
__init__.cpython-37.pyc	1.61 KB	Del OK
bench.cpython-37.opt-1.pyc	3.88 KB	Del OK
bench.cpython-37.pyc	3.88 KB	Del OK
core.cpython-37.opt-1.pyc	203.12 KB	Del OK
core.cpython-37.pyc	203.12 KB	Del OK
extras.cpython-37.opt-1.pyc	48.4 KB	Del OK
extras.cpython-37.pyc	48.4 KB	Del OK
mrecords.cpython-37.opt-1.pyc	22 KB	Del OK
mrecords.cpython-37.pyc	22 KB	Del OK
setup.cpython-37.opt-1.pyc	616 B	Del OK
setup.cpython-37.pyc	616 B	Del OK
testutils.cpython-37.opt-1.pyc	8.15 KB	Del OK
testutils.cpython-37.pyc	8.15 KB	Del OK
timer_comparison.cpython-37.opt-1.pyc	9.38 KB	Del OK
timer_comparison.cpython-37.pyc	10.96 KB	Del OK
version.cpython-37.opt-1.pyc	648 B	Del OK
version.cpython-37.pyc	648 B	Del OK

Edit: __init__.cpython-37.pyc

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�e ��jZe ��jZd S�)au�� ============= Masked Arrays ============= Arrays sometimes contain invalid or missing data. When doing operations on such arrays, we wish to suppress invalid values, which is the purpose masked arrays fulfill (an example of typical use is given below). For example, examine the following array: >>> x = np.array([2, 1, 3, np.nan, 5, 2, 3, np.nan]) When we try to calculate the mean of the data, the result is undetermined: >>> np.mean(x) nan The mean is calculated using roughly ``np.sum(x)/len(x)``, but since any number added to ``NaN`` [1]_ produces ``NaN``, this doesn't work. Enter masked arrays: >>> m = np.ma.masked_array(x, np.isnan(x)) >>> m masked_array(data = [2.0 1.0 3.0 -- 5.0 2.0 3.0 --], mask = [False False False True False False False True], fill_value=1e+20) Here, we construct a masked array that suppress all ``NaN`` values. We may now proceed to calculate the mean of the other values: >>> np.mean(m) 2.6666666666666665 .. [1] Not-a-Number, a floating point value that is the result of an invalid operation. .. moduleauthor:: Pierre Gerard-Marchant .. moduleauthor:: Jarrod Millman �����)�division�absolute_import�print_function�
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