Computer program to analyze directional data, based on the methods of Fisher and Watson |
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Authors: | John H. Schuenemeyer George S. Koch Jr. Richard F. Link |
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Affiliation: | (1) University of Georgia, USA;(2) Artronic Information Systems, Inc., USA |
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Abstract: | Based on the methods of Fisher and Watson,Fortran ivcomputer programs are presented for the following analyses of directional observations on the sphere: (1) to determine if points are randomly distributed; (2) to estimate the azimuth and inclination of the center (mean direction) of a cluster and to estimate the precision (closeness) with which points are clustered; (3) to determine if two or more clusters have the same mean direction; (4) to determine if two clusters have the same precision of clustering; and (5) to locate the pole of a greatcircle girdle of points. Limitations of these analyses for undirected directional observations on the hemisphere also are given. |
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Keywords: | cluster analysis factor analysis mapping statistics petrology structure |
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