Matrix Pseudoinverse (2x2)

Math

Calculate Moore-Penrose pseudoinverse for 2x2 matrix. Formula: A+ = (A^T · A)^(-1) · A^T. Used for solving least-squares problems.

Formula

Pseudoinverse via (A^T A)^(-1) A^T (simplified for 2x2)

Simple 2x2

Inputs
  • A[1,1]: 1
  • A[1,2]: 2
  • A[2,1]: 3
  • A[2,2]: 4

Inverse computed

Frequently asked questions

Used for?
Least-squares regression, solving underdetermined systems