numpy.ones使用方法

https://docs.scipy.org/doc/numpy-1.16.1/reference/generated/numpy.ones.html?highlight=ones

numpy.ones(shape, dtype=None, order=’C’)

Return a new array of given shape and type, filled with ones.

例子

>>> np.ones(5)
array([ 1.,  1.,  1.,  1.,  1.])

>>> np.ones((5,), dtype=int)
array([1, 1, 1, 1, 1])

>>> np.ones((2, 1))
array([[ 1.],
       [ 1.]])

>>> s = (2,2)
>>> np.ones(s)
array([[ 1.,  1.],
       [ 1.,  1.]])