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## Figure 1.
Receiver Operating Characteristic (ROC) curves for various tree cutting strategies,
using the Ward's method clustering based on the VAST Nres similarity score. The true
positive rate (TPR, Y axis) is plotted against the false positive rate (FPR, X axis).
Black curves correspond to largest size cut (solid line), longest branch cut (dotted
line) and level cut (dash-dot line) strategies, which use only of tree topology parameters.
The red dotted curve corresponds to the MI cut strategy, which uses SCOP classification
information directly, so is viewed only as an approximate upper bound to the SCOP-independent
strategies. The Y-axis intercept for this curve is 0.45 and close to 0.0 for all SCOP-independent
strategies. Only the portion of the curve for FPR values below 0.45 is shown. Between
this FPR value and 0.63 relative positions of the curves do not vary. Above 0.63 FPR
value all curve superpose to the MI cut curve.
Sam |