numpy.ma.identity¶

numpy.ma.identity(n,dtype=None) = <numpy.ma.core._convert2ma object>¶

Return the identity array.

The identity array is a square array with ones onthe main diagonal.

Parameters:	n:int Number of rows (and columns) inn xn output. dtype:data-type, optional Data-type of the output. Defaults tofloat.
Returns:	out:ndarray n xn array with its main diagonal set to one,and all other elements 0.

Examples

>>>np.identity(3)array([[ 1.,  0.,  0.],       [ 0.,  1.,  0.],       [ 0.,  0.,  1.]])