numpy.matlib.ones

numpy.matlib.ones(shape, dtype=None, order='C')[源代码]

Matrix of ones.

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

Parameters:
shape : {sequence of ints, int}

Shape of the matrix

dtype : data-type, optional

The desired data-type for the matrix, default is np.float64.

order : {‘C’, ‘F’}, optional

Whether to store matrix in C- or Fortran-contiguous order, default is ‘C’.

Returns:
out : matrix

Matrix of ones of given shape, dtype, and order.

参见

ones
Array of ones.
matlib.zeros
Zero matrix.

Notes

If shape has length one i.e. (N,), or is a scalar N, out becomes a single row matrix of shape (1,N).

Examples

>>> np.matlib.ones((2,3))
matrix([[ 1.,  1.,  1.],
        [ 1.,  1.,  1.]])
>>> np.matlib.ones(2)
matrix([[ 1.,  1.]])