Statistics – Computation
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100.1314b&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, Nov. 1988, p. 1314-1319. Research supported by the
Statistics
Computation
10
Computational Astrophysics, Cosmology, Galactic Clusters, Pattern Recognition, Red Shift, Sky Surveys (Astronomy), Spatial Distribution, Statistical Analysis, Visual Perception
Scientific paper
It is shown that the eye is good at detecting global coherence and at the same time easily fooled into seeing large-scale filamentary features where none exists. For this reason an objective method of identification that also assesses statistical significance is necessary to confirm or reject the presence of filaments in the distribution of galaxies. It has been found that a construction called the minimal spanning tree (MST), together with a data-permuting technique, works very well. The validity of this procedure is demonstrated on Glass patterns, and it is shown that the subjective interpretation of visual cues must be questioned. The MST procedure applied to the CfA redshift data finds statistical evidence for the presence of filamentary features.
Bhavsar Suketu P.
Ling Nigel E.
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