numpy.ones()

numpy.ones(shape, dtype=None, order='C') [source]

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

Parameters:

Parameters:	shape : int or sequence of ints Shape of the new array, e.g., `(2, 3)` or `2`. dtype : data-type, optional The desired data-type for the array, e.g., `numpy.int8`. Default is `numpy.float64`. order : {?C?, ?F?}, optional Whether to store multidimensional data in C- or Fortran-contiguous (row- or column-wise) order in memory.
Returns:	out : ndarray Array of ones with the given shape, dtype, and order.

shape : int or sequence of ints

Shape of the new array, e.g., (2, 3) or 2.

dtype : data-type, optional

The desired data-type for the array, e.g., numpy.int8. Default is numpy.float64.

order : {?C?, ?F?}, optional

Whether to store multidimensional data in C- or Fortran-contiguous (row- or column-wise) order in memory.

Returns:

out : ndarray

Array of ones with the given shape, dtype, and order.

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

>>> np.ones((5,), dtype=np.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.]])

Links:

doc_NumPy

2017-01-10 18:16:23

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