quiqui score 4985
2018/10/13 09:41 投稿
| `numpy.sign`もありますよ。 |
| [https://docs.scipy.org/doc/numpy-1.15.1/reference/generated/numpy.sign.html](https://docs.scipy.org/doc/numpy-1.15.1/reference/generated/numpy.sign.html) |
| ``` |
| >>> import numpy |
| >>> numpy.sign(-1.0) |
| -1.0 |
| >>> numpy.sign(0) |
| 0 |
| >>> numpy.sign(0.0) |
| 0.0 |
| >>> numpy.sign(1) |
| 1 |
| >>> numpy.sign([1, 0.1, 0, 0.0, -0.2, -4]) |
| array([ 1., 1., 0., 0., -1., -1.]) |
| >>> numpy.sign([2, 1, 0, -1, -2]) |
| array([ 1, 1, 0, -1, -1]) |
| ``` |
| 引数の型で返り値の型も変わりますが。 |
