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__init__.py

"""
=============
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

"""
from . import core
from .core import *

from . import extras
from .extras import *

__all__ = ['core', 'extras']
__all__ += core.__all__
__all__ += extras.__all__

from numpy._pytesttester import PytestTester
test = PytestTester(__name__)
del PytestTester

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..	dir	-	root/root	0755	2025-05-15 08:30:44
__pycache__	dir	-	root/root	0755	2025-05-15 08:31:42
tests	dir	-	root/root	0755	2025-05-15 08:30:44
__init__.py	text/plain	1.37 KB	root/root	0644	2025-04-17 01:10:58
__init__.pyi	text/x-script.python	5.92 KB	root/root	0644	2025-04-17 01:10:58
core.py	text/plain	271.51 KB	root/root	0644	2025-04-17 01:10:58
core.pyi	text/x-script.python	13.97 KB	root/root	0644	2025-04-17 01:10:58
extras.py	text/plain	62.87 KB	root/root	0644	2025-04-17 01:10:58
extras.pyi	text/x-script.python	2.58 KB	root/root	0644	2025-04-17 01:10:58
mrecords.py	text/plain	26.59 KB	root/root	0644	2025-04-17 01:10:58
mrecords.pyi	text/x-script.python	1.89 KB	root/root	0644	2025-04-17 01:10:58
setup.py	text/x-script.python	418 B	root/root	0644	2025-04-17 01:10:58
testutils.py	text/plain	10 KB	root/root	0644	2025-04-17 01:10:58
timer_comparison.py	text/x-script.python	15.29 KB	root/root	0644	2025-04-17 01:10:58

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