What is the identity matrix in NumPy?

Can you explain what an identity matrix is in NumPy?

Sure! An identity matrix is a square matrix with ones on the diagonal and zeros elsewhere. In NumPy, you can create it using the numpy.eye() function.

How do I create a 3x3 identity matrix using NumPy?

You can create a 3x3 identity matrix by using the command numpy.eye(3). This will return a 3x3 matrix with ones on the diagonal.

Can I create an identity matrix of a different size?

Yes, you can specify any size by changing the argument in numpy.eye(). For example, numpy.eye(5) will create a 5x5 identity matrix.

What if I want to create a non-square identity matrix?

Identity matrices are always square, but you can create a rectangular matrix with ones on the diagonal using numpy.eye(rows, cols) where rows and cols are the desired dimensions.