numpy.ones — NumPy v1.13 Manual (original) (raw)
numpy. ones(shape, dtype=None, order='C')[source]¶
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) or 2. 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. |
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| Returns: | out : ndarray Array of ones with the given shape, dtype, and order. |
Examples
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.]])