%feature("docstring") OT::IdentityMatrix
"Identity matrix.

Parameters
----------
size : int, :math:`n > 0`, optional
    Matrix size.
    Default is 1.

Examples
--------
Create a matrix

>>> import openturns as ot
>>> M = ot.IdentityMatrix(2)
>>> print(M)
[[ 1 0 ]
 [ 0 1 ]]"
