当前位置: 首页>>代码示例>>Python>>正文


Python numpy.signbit方法代码示例

本文整理汇总了Python中numpy.signbit方法的典型用法代码示例。如果您正苦于以下问题:Python numpy.signbit方法的具体用法?Python numpy.signbit怎么用?Python numpy.signbit使用的例子?那么恭喜您, 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numpy的用法示例。


在下文中一共展示了numpy.signbit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: test_float

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [as 别名]
def test_float(self):
        # offset for alignment test
        for i in range(4):
            assert_array_equal(self.f[i:] > 0, self.ef[i:])
            assert_array_equal(self.f[i:] - 1 >= 0, self.ef[i:])
            assert_array_equal(self.f[i:] == 0, ~self.ef[i:])
            assert_array_equal(-self.f[i:] < 0, self.ef[i:])
            assert_array_equal(-self.f[i:] + 1 <= 0, self.ef[i:])
            r = self.f[i:] != 0
            assert_array_equal(r, self.ef[i:])
            r2 = self.f[i:] != np.zeros_like(self.f[i:])
            r3 = 0 != self.f[i:]
            assert_array_equal(r, r2)
            assert_array_equal(r, r3)
            # check bool == 0x1
            assert_array_equal(r.view(np.int8), r.astype(np.int8))
            assert_array_equal(r2.view(np.int8), r2.astype(np.int8))
            assert_array_equal(r3.view(np.int8), r3.astype(np.int8))

            # isnan on amd64 takes the same code path
            assert_array_equal(np.isnan(self.nf[i:]), self.ef[i:])
            assert_array_equal(np.isfinite(self.nf[i:]), ~self.ef[i:])
            assert_array_equal(np.isfinite(self.inff[i:]), ~self.ef[i:])
            assert_array_equal(np.isinf(self.inff[i:]), self.efnonan[i:])
            assert_array_equal(np.signbit(self.signf[i:]), self.ef[i:]) 
开发者ID:Frank-qlu,项目名称:recruit,代码行数:27,代码来源:test_numeric.py

示例2: test_double

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [as 别名]
def test_double(self):
        # offset for alignment test
        for i in range(2):
            assert_array_equal(self.d[i:] > 0, self.ed[i:])
            assert_array_equal(self.d[i:] - 1 >= 0, self.ed[i:])
            assert_array_equal(self.d[i:] == 0, ~self.ed[i:])
            assert_array_equal(-self.d[i:] < 0, self.ed[i:])
            assert_array_equal(-self.d[i:] + 1 <= 0, self.ed[i:])
            r = self.d[i:] != 0
            assert_array_equal(r, self.ed[i:])
            r2 = self.d[i:] != np.zeros_like(self.d[i:])
            r3 = 0 != self.d[i:]
            assert_array_equal(r, r2)
            assert_array_equal(r, r3)
            # check bool == 0x1
            assert_array_equal(r.view(np.int8), r.astype(np.int8))
            assert_array_equal(r2.view(np.int8), r2.astype(np.int8))
            assert_array_equal(r3.view(np.int8), r3.astype(np.int8))

            # isnan on amd64 takes the same code path
            assert_array_equal(np.isnan(self.nd[i:]), self.ed[i:])
            assert_array_equal(np.isfinite(self.nd[i:]), ~self.ed[i:])
            assert_array_equal(np.isfinite(self.infd[i:]), ~self.ed[i:])
            assert_array_equal(np.isinf(self.infd[i:]), self.ednonan[i:])
            assert_array_equal(np.signbit(self.signd[i:]), self.ed[i:]) 
开发者ID:Frank-qlu,项目名称:recruit,代码行数:27,代码来源:test_numeric.py

示例3: test_numpy_type_funcs

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [as 别名]
def test_numpy_type_funcs(func):
    # for func in [np.isfinite, np.isinf, np.isnan, np.signbit]:
    # copy and paste from idx fixture as pytest doesn't support
    # parameters and fixtures at the same time.
    major_axis = Index(['foo', 'bar', 'baz', 'qux'])
    minor_axis = Index(['one', 'two'])
    major_codes = np.array([0, 0, 1, 2, 3, 3])
    minor_codes = np.array([0, 1, 0, 1, 0, 1])
    index_names = ['first', 'second']

    idx = MultiIndex(
        levels=[major_axis, minor_axis],
        codes=[major_codes, minor_codes],
        names=index_names,
        verify_integrity=False
    )

    with pytest.raises(Exception):
        func(idx) 
开发者ID:Frank-qlu,项目名称:recruit,代码行数:21,代码来源:test_analytics.py

示例4: encode_1bit

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [as 别名]
def encode_1bit(values):
    """Encodes values using 1 bit per sample, packing the result into bytes."""
    bitvalues = np.signbit(values.reshape(-1, 8)).view(np.uint8)
    return np.packbits(bitvalues[:, ::-1]) 
开发者ID:mhvk,项目名称:baseband,代码行数:6,代码来源:payload.py

示例5: test_nans_infs

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [as 别名]
def test_nans_infs(self):
        with np.errstate(all='ignore'):
            # Check some of the ufuncs
            assert_equal(np.isnan(self.all_f16), np.isnan(self.all_f32))
            assert_equal(np.isinf(self.all_f16), np.isinf(self.all_f32))
            assert_equal(np.isfinite(self.all_f16), np.isfinite(self.all_f32))
            assert_equal(np.signbit(self.all_f16), np.signbit(self.all_f32))
            assert_equal(np.spacing(float16(65504)), np.inf)

            # Check comparisons of all values with NaN
            nan = float16(np.nan)

            assert_(not (self.all_f16 == nan).any())
            assert_(not (nan == self.all_f16).any())

            assert_((self.all_f16 != nan).all())
            assert_((nan != self.all_f16).all())

            assert_(not (self.all_f16 < nan).any())
            assert_(not (nan < self.all_f16).any())

            assert_(not (self.all_f16 <= nan).any())
            assert_(not (nan <= self.all_f16).any())

            assert_(not (self.all_f16 > nan).any())
            assert_(not (nan > self.all_f16).any())

            assert_(not (self.all_f16 >= nan).any())
            assert_(not (nan >= self.all_f16).any()) 
开发者ID:Frank-qlu,项目名称:recruit,代码行数:31,代码来源:test_half.py

示例6: test_floor_division_signed_zero

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [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) 
开发者ID:Frank-qlu,项目名称:recruit,代码行数:8,代码来源:test_umath.py

示例7: assert_arctan2_ispzero

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [as 别名]
def assert_arctan2_ispzero(x, y):
    assert_((ncu.arctan2(x, y) == 0 and not np.signbit(ncu.arctan2(x, y))), "arctan(%s, %s) is %s, not +0" % (x, y, ncu.arctan2(x, y))) 
开发者ID:Frank-qlu,项目名称:recruit,代码行数:4,代码来源:test_umath.py

示例8: test_copysign

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [as 别名]
def test_copysign():
    assert_(np.copysign(1, -1) == -1)
    with np.errstate(divide="ignore"):
        assert_(1 / np.copysign(0, -1) < 0)
        assert_(1 / np.copysign(0, 1) > 0)
    assert_(np.signbit(np.copysign(np.nan, -1)))
    assert_(not np.signbit(np.copysign(np.nan, 1))) 
开发者ID:Frank-qlu,项目名称:recruit,代码行数:9,代码来源:test_umath.py

示例9: test_pos_nan

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [as 别名]
def test_pos_nan():
    """Check np.nan is a positive nan."""
    assert_(np.signbit(np.nan) == 0) 
开发者ID:Frank-qlu,项目名称:recruit,代码行数:5,代码来源:test_umath.py

示例10: assert_arctan2_isnzero

# 需要导入模块: import numpy [as 别名]
# 或者: from numpy import signbit [as 别名]
def assert_arctan2_isnzero(x, y):
    assert_((ncu.arctan2(x, y) == 0 and np.signbit(ncu.arctan2(x, y))), "arctan(%s, %s) is %s, not -0" % (x, y, ncu.arctan2(x, y))) 
开发者ID:abhisuri97,项目名称:auto-alt-text-lambda-api,代码行数:4,代码来源:test_umath.py


注:本文中的numpy.signbit方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。