********
Routines
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In this chapter routine docstrings are presented, grouped by functionality.
Many docstrings contain example code, which demonstrates basic usage
of the routine. The examples assume that NumPy is imported with::

  >>> import numpy as np

A convenient way to execute examples is the ``%doctest_mode`` mode of
IPython, which allows for pasting of multi-line examples and preserves
indentation.

.. toctree::
   :maxdepth: 2

   routines.array-creation
   routines.array-manipulation
   routines.indexing
   routines.dtype
   routines.io
   routines.fft
   routines.linalg
   routines.random
   routines.sort
   routines.logic
   routines.bitwise
   routines.statistics
   routines.math
   routines.functional
   routines.polynomials
   routines.datetime
   routines.financial
   routines.set
   routines.window
   routines.err
   routines.maskna
   routines.ma
   routines.help
   routines.other
   routines.testing
   routines.emath
   routines.matlib
   routines.dual
   routines.numarray
   routines.oldnumeric
   routines.ctypeslib
   routines.char