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. 2005 May 31;6:132. doi: 10.1186/1471-2105-6-132

Table 1.

The L2<> norm

Measurement L2<> distance

ypred > ymeas ypred < ymeas
Quantitative (no threshold) (ypred-ymeas)2 (ypred-ymeas)2
Upper boundary (threshold: greater) 0 (ypred-ymeas)2
Lower boundary (threshold: lesser) (ypred-ymeas)2 0