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QR decomposition for real-valued matrices

**Library:**Fixed-Point Designer HDL Support / Matrices and Linear Algebra / Matrix Factorizations

The Real Partial-Systolic QR Decomposition block uses QR decomposition to
compute *R* and *C* = *Q*'*B*, where *Q**R* = *A*, and *A* and *B* are real-valued matrices.
The least-squares solution to *A**x* = *B* is *x* = *R*\*C*. *R* is an upper triangular matrix and *Q*
is an orthogonal matrix. To compute *C* = *Q'*, set *B* to be the identity matrix.

- Complex Partial-Systolic QR Decomposition | Real Burst QR Decomposition | Real Partial-Systolic Q-less QR Decomposition