XGANDALF – extended gradient descent algorithm for lattice finding

Gevorkov, Y.; Yefanov, O.; Barty, A.; White, T.A.; Mariani, V.; Brehm, W.; Tolstikova, A.; Grigat, R.-R.; Chapman, H.N.

doi:10.1107/S2053273319010593

Acta Crystallographica Section A
Acta Crystallographica
Section A FOUNDATIONS AND ADVANCES

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Figure 6
Score functions for a set of 13 simulated nodes that were generated by adding noise to the position of randomly chosen points on a lattice grid. For images (b)–(f) an additional seven spurious nodes were added, i.e. nodes not lying on the lattice. (a) Proximity function c₂, no spurious nodes. (b) Proximity function c₂. (c) Proximity function c₁. (d) Proximity function c₂ with inverse radial weighting. (e) Proximity function c₂ with score function from equation (6)