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-rw-r--r--numpy/lib/ufunclike.py58
1 files changed, 0 insertions, 58 deletions
diff --git a/numpy/lib/ufunclike.py b/numpy/lib/ufunclike.py
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--- a/numpy/lib/ufunclike.py
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-"""
-Module of functions that are like ufuncs in acting on arrays and optionally
-storing results in an output array.
-"""
-__all__ = ['fix', 'isneginf', 'isposinf', 'log2']
-
-import numpy.core.numeric as nx
-from numpy.core.numeric import asarray, empty, isinf, signbit
-import numpy.core.umath as umath
-
-def fix(x, y=None):
- """ Round x to nearest integer towards zero.
- """
- x = asarray(x)
- if y is None:
- y = nx.floor(x)
- else:
- nx.floor(x, y)
- if x.ndim == 0:
- if (x<0):
- y += 1
- else:
- y[x<0] = y[x<0]+1
- return y
-
-def isposinf(x, y=None):
- """Return a boolean array y with y[i] True for x[i] = +Inf.
-
- If y is an array, the result replaces the contents of y.
- """
- if y is None:
- y = empty(x.shape, dtype=nx.bool_)
- umath.logical_and(isinf(x), ~signbit(x), y)
- return y
-
-def isneginf(x, y=None):
- """Return a boolean array y with y[i] True for x[i] = -Inf.
-
- If y is an array, the result replaces the contents of y.
- """
- if y is None:
- y = empty(x.shape, dtype=nx.bool_)
- umath.logical_and(isinf(x), signbit(x), y)
- return y
-
-_log2 = umath.log(2)
-def log2(x, y=None):
- """Returns the base 2 logarithm of x
-
- If y is an array, the result replaces the contents of y.
- """
- x = asarray(x)
- if y is None:
- y = umath.log(x)
- else:
- umath.log(x, y)
- y /= _log2
- return y