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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: J Biomed Inform. 2008 May 24;42(1):74–81. doi: 10.1016/j.jbi.2008.05.009

Table 4.

Validity of clusters depending on different degrees of α for dataset A. Two measures were used: compactness and separation [31] and z-scores [33], shown in parentheses. The z-scores are computed as an average of 10 repetitions for each pair of α and r.

graphic file with name nihms-100302-t0003.jpg 0.1 0.2 0.3 0.4 0.5
0.00 58.1 (318.5) 58.1 (318.5) 58.1 (318.5) 58.1 (318.5) 58.1 (318.5)
0.10 45.1 (323.1) 35.5 (327.8) 29.4 (315.7) 25.6 (337.1) 23.0 (320.9)
0.20 33.7 (315.4) 24.1 (330.0) 20.3 (330.1) 19.6 (348.0) 24.0 (326.1)
0.30 26.2 (327.3) 19.5 (322.6) 24.9 (335.5) 37.8 (323.7) 58.9 (322.2)
0.50 19.6 (327.0) 50.9 (316.2) 126.5 (331.3) 247.0 (338.8) 432.1 (335.4)
0.70 72.5 (328.2) 363.4 (326.8) 1002.6 (335.6) 2033.6 (307.6) 3480.0 (270.3)