numpy.ma.ones¶
-
numpy.ma.
ones
(shape, dtype=None, order='C') = <numpy.ma.core._convert2ma object>¶ Return a new array of given shape and type, filled with ones.
Parameters: shape : int or sequence of ints
Shape of the new array, e.g.,
(2, 3)
or2
.dtype : data-type, optional
The desired data-type for the array, e.g.,
numpy.int8
. Default isnumpy.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.
See also
zeros
,ones_like
Examples
>>> 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.]])