Error measures for DR chords: Difference between revisions
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=== BFGS-B (one related delta set, arbitrary free deltas) === | === BFGS-B (one related delta set, arbitrary free deltas) === | ||
We let {{nowrap|''x''<sub>1</sub> {{=}} ''x''}} and include additional free variables ''x''<sub>2</sub>, ..., ''x''<sub>n</sub>, one for every additional +?, after coalescing strings of consecutive +?'s into one +? and after trimming leading and trailing free delta segments. | We let {{nowrap|''x''<sub>1</sub> {{=}} ''x''}} and include additional free variables ''x''<sub>2</sub>, ..., ''x''<sub>''n''</sub>, one for every additional +?, after coalescing strings of consecutive +?'s into one +? and after trimming leading and trailing free delta segments. | ||
BFGS-B is a quasi-Newton optimization method (based on BFGS) particularly suited for this problem: | BFGS-B is a quasi-Newton optimization method (based on BFGS) particularly suited for this problem: | ||