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Algorithms for finding the axis of a helix: fast rotational and parametric least-squares methods
J A Christopher1, R Swanson, T O Baldwin
1Department of Biochemistry & Biophysics, Texas A&M University 77843-2128, USA.
Computers & Chemistry
|September 1, 1996
Abstract:
Several methods for finding the axis of a helix are presented and compared. The most accurate determines the helix axis as the axis of rotation necessary to map point i to point i + 1 of the helix. The fastest method calculates the helix axis as the best-fit line through the coordinates by a three-dimensional parametric linear least-squares algorithm, taking advantage of the sequential nature of the data.