原文:https://docs.scipy.org/doc/numpy/reference/generated/numpy.sinh.html
校对:(虚位以待)
numpy.
sinh
(x[, out]) = <ufunc 'sinh'>双曲正弦,元素。
等于1/2 * (np.exp(x) - np。 exp(-x))
或-1j * np.sin(1j * x)
。
参数: | x:array_like
out:ndarray,可选
|
---|---|
返回: | y:ndarray
|
上升: | ValueError:invalid return数组shape
|
笔记
如果提供out,则函数将结果写入其中,并返回对out的引用。(参见实施例)
参考文献
Abramowitz和I.A. Stegun,Handbook of Mathematical Functions。New York,NY:Dover,1972,pg。83.
例子
>>> np.sinh(0)
0.0
>>> np.sinh(np.pi*1j/2)
1j
>>> np.sinh(np.pi*1j) # (exact value is 0)
1.2246063538223773e-016j
>>> # Discrepancy due to vagaries of floating point arithmetic.
>>> # Example of providing the optional output parameter
>>> out2 = np.sinh([0.1], out1)
>>> out2 is out1
True
>>> # Example of ValueError due to provision of shape mis-matched `out`
>>> np.sinh(np.zeros((3,3)),np.zeros((2,2)))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: invalid return array shape