本文整理汇总了Python中numpy.positive方法的典型用法代码示例。如果您正苦于以下问题：Python numpy.positive方法的具体用法？Python numpy.positive怎么用？Python numpy.positive使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类numpy的用法示例。
在下文中一共展示了numpy.positive方法的10个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: positive
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def positive(x, out=None, where=None, **kwargs):
"""
Numerical positive, element-wise.
Parameters
----------
x : array_like or scalar
Input tensor.
Returns
-------
y : Tensor or scalar
Returned array or scalar: `y = +x`.
"""
op = TensorPositive(**kwargs)
return op(x, out=out, where=where) 示例2: test_datetime_unary
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def test_datetime_unary(self):
for tda, tdb, tdzero, tdone, tdmone in \
[
# One-dimensional arrays
(np.array([3], dtype='m8[D]'),
np.array([-3], dtype='m8[D]'),
np.array([0], dtype='m8[D]'),
np.array([1], dtype='m8[D]'),
np.array([-1], dtype='m8[D]')),
# NumPy scalars
(np.timedelta64(3, '[D]'),
np.timedelta64(-3, '[D]'),
np.timedelta64(0, '[D]'),
np.timedelta64(1, '[D]'),
np.timedelta64(-1, '[D]'))]:
# negative ufunc
assert_equal(-tdb, tda)
assert_equal((-tdb).dtype, tda.dtype)
assert_equal(np.negative(tdb), tda)
assert_equal(np.negative(tdb).dtype, tda.dtype)
# positive ufunc
assert_equal(np.positive(tda), tda)
assert_equal(np.positive(tda).dtype, tda.dtype)
assert_equal(np.positive(tdb), tdb)
assert_equal(np.positive(tdb).dtype, tdb.dtype)
# absolute ufunc
assert_equal(np.absolute(tdb), tda)
assert_equal(np.absolute(tdb).dtype, tda.dtype)
# sign ufunc
assert_equal(np.sign(tda), tdone)
assert_equal(np.sign(tdb), tdmone)
assert_equal(np.sign(tdzero), tdzero)
assert_equal(np.sign(tda).dtype, tda.dtype)
# The ufuncs always produce native-endian results
assert_ 示例3: test_string_parser_variants
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def test_string_parser_variants(self):
# Allow space instead of 'T' between date and time
assert_equal(np.array(['1980-02-29T01:02:03'], np.dtype('M8[s]')),
np.array(['1980-02-29 01:02:03'], np.dtype('M8[s]')))
# Allow positive years
assert_equal(np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
np.array(['+1980-02-29 01:02:03'], np.dtype('M8[s]')))
# Allow negative years
assert_equal(np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
np.array(['-1980-02-29 01:02:03'], np.dtype('M8[s]')))
# UTC specifier
with assert_warns(DeprecationWarning):
assert_equal(
np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
np.array(['+1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
with assert_warns(DeprecationWarning):
assert_equal(
np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
np.array(['-1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
# Time zone offset
with assert_warns(DeprecationWarning):
assert_equal(
np.array(['1980-02-29T02:02:03'], np.dtype('M8[s]')),
np.array(['1980-02-29 00:32:03-0130'], np.dtype('M8[s]')))
with assert_warns(DeprecationWarning):
assert_equal(
np.array(['1980-02-28T22:32:03'], np.dtype('M8[s]')),
np.array(['1980-02-29 00:02:03+01:30'], np.dtype('M8[s]')))
with assert_warns(DeprecationWarning):
assert_equal(
np.array(['1980-02-29T02:32:03.506'], np.dtype('M8[s]')),
np.array(['1980-02-29 00:32:03.506-02'], np.dtype('M8[s]')))
with assert_warns(DeprecationWarning):
assert_equal(np.datetime64('1977-03-02T12:30-0230'),
np.datetime64('1977-03-02T15:00')) 示例4: test_floor_division_signed_zero
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def test_floor_division_signed_zero(self):
# Check that the sign bit is correctly set when dividing positive and
# negative zero by one.
x = np.zeros(10)
assert_equal(np.signbit(x//1), 0)
assert_equal(np.signbit((-x)//1), 1) 示例5: test_power_zero
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def test_power_zero(self):
# ticket #1271
zero = np.array([0j])
one = np.array([1+0j])
cnan = np.array([complex(np.nan, np.nan)])
# FIXME cinf not tested.
#cinf = np.array([complex(np.inf, 0)])
def assert_complex_equal(x, y):
x, y = np.asarray(x), np.asarray(y)
assert_array_equal(x.real, y.real)
assert_array_equal(x.imag, y.imag)
# positive powers
for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
assert_complex_equal(np.power(zero, p), zero)
# zero power
assert_complex_equal(np.power(zero, 0), one)
with np.errstate(invalid="ignore"):
assert_complex_equal(np.power(zero, 0+1j), cnan)
# negative power
for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
assert_complex_equal(np.power(zero, -p), cnan)
assert_complex_equal(np.power(zero, -1+0.2j), cnan) 示例6: test_valid
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def test_valid(self):
valid_dtypes = [int, float, complex, object]
for dtype in valid_dtypes:
x = np.arange(5, dtype=dtype)
result = np.positive(x)
assert_equal(x, result, err_msg=str(dtype)) 示例7: test_invalid
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def test_invalid(self):
with assert_raises(TypeError):
np.positive(True)
with assert_raises(TypeError):
np.positive(np.datetime64('2000-01-01'))
with assert_raises(TypeError):
np.positive(np.array(['foo'], dtype=str))
with assert_raises(TypeError):
np.positive(np.array(['bar'], dtype=object)) 示例8: test_pos_nan
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def test_pos_nan():
"""Check np.nan is a positive nan."""
assert_(np.signbit(np.nan) == 0) 示例9: test_exceptions
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def test_exceptions(self):
a = np.ones(1, dtype=np.bool_)
assert_raises(TypeError, np.negative, a)
assert_raises(TypeError, np.positive, a)
assert_raises(TypeError, np.subtract, a, a) 示例10: positive
# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import positive [as 别名]
def positive(x):
return _scalar(lambda x: x, x)