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Selection of the core parameters in ALFATClust

JC Jimmy Ka Ho Chiu
RO Rick Twee-Hee Ong
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The value of γhigh is supposed to approach the maximum possible edge weight value (i.e. 1) so that the raw clusters detected in the first iteration are robust against size bias. Most of the actual cut-offs for individual clusters are expected to appear above γlow, which still needs to be set as high as possible to avoid capturing subsequent trivial (but larger) drops. For example, a decrease of edge weight from 0.85 to 0.72 is more significant than the next even larger drop from 0.74 to 0.59. The smaller the value of Δ the lesser is the size bias for CPM in an iteration. The minimum value for γhigh is at least 0.95. The value for Δ should not exceed 0.025. Both γhigh and Δ are usually relatively invariant and the value of γlow can set between 0.7 and 0.8.

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