numpy.identity(n, dtype = None) : Return a identity matrix i.e. a square matrix with ones on the main diagonal.
Parameters : n : [int] Dimension n x n of output array dtype : [optional, float(by Default)] Data type of returned array.
Returns : identity array of dimension n x n, with its main diagonal set to one, and all other elements 0.
Matrix b : [[ 1. 0.] [ 0. 1.]] Matrix a : [[ 1. 0. 0. 0.] [ 0. 1. 0. 0.] [ 0. 0. 1. 0.] [ 0. 0. 0. 1.]]
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