Finding generalized inverse matrices of non-square matrix in MATLAB

If it is not a square matrix, there will be a generalized inverse matrix (pseudo inverse), which is implemented using pinv () in MATLAB.
The basic syntax is X = pinv (A), x = pinv (A, Tol), where ToL is an error, and pinv is the abbreviation of pseudo-inverse: max (SIZE ()) * norm (a) * EPS.The function returns a matrix X that is the same as the transpose matrix A' of.And satisfies the following requirements: Axa = A, xax = x. In this case, matrix X is called the pseudo-inverse of matrix A, also known as the generalized inverse matrix.

1. > A = rand (2, 3)
2. A =
3. 0.9572 0.8003 0.4218
4. 0.4854 0.1419 0.9157
5. > B = pinv ()
6. B =
7. 0.5985-0.0838
8. 0.7633-0.5430
9. -0.4355 1.2206
10. > A * B *
11. Ans =
12. 0.9572 0.8003 0.4218
13. 0.4854 0.1419 0.9157

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