Returns an element-wise indication of the sign of a number.
The sign function returns -1 if x < 0, 0 if x==0, 1 if x > 0. nan is returned for nan inputs.
For complex inputs, the sign function returns sign(x.real) + 0j if x.real != 0 else sign(x.imag) + 0j.
complex(nan, 0) is returned for complex nan inputs.
Parameters:x : array_like
Returns:Input values.
y : ndarray
The sign of x.
Notes
There is more than one definition of sign in common use for complex numbers. The definition used here is equivalent to which is different from a common alternative, .
Examples
>>> np.sign([-5., 4.5]) array([-1., 1.]) >>> np.sign(0) 0 >>> np.sign(5-2j) (1+0j)
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4