scipy.optimize._lsq.givens_elimination:givens_elimination

Extended Summary

The matrix has the structure

[ S ]
[ D ]

Where S is an upper triangular matrix with shape (n, n) and D is a diagonal matrix with shape (n, n) with elements from diag. This function applies Givens rotations to it such that the resulting matrix has zeros in place of D.

Array S will be modified in-place.

Array v of shape (n,) is the part of the full vector with shape (2*n,)

[ v ]
[ 0 ]

to which Givens rotations are applied. This array is modified in place, such that on exit it contains the first n components of the above mentioned vector after rotations were applied.