numpy.ones¶

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) or2. dtype:data-type, optional The desired data-type for the array, e.g.,numpy.int8. Default isnumpy.float64. order:{‘C’, ‘F’}, optional, default: C Whether to store multi-dimensional data in row-major(C-style) or column-major (Fortran-style) order inmemory.
Returns:	out:ndarray Array of ones with the given shape, dtype, and order.

See also

ones_like

Return an array of ones with shape and type of input.

empty

Return a new uninitialized array.

zeros

Return a new array setting values to zero.

full

Return a new array of given shape filled with value.

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.]])