(2) 夹角余弦法: ∑ ∑ ∑ = = = ⋅ ⋅ = m k jkik m k jkik ij xx r 1 1 22 1 , ),,2,1,( nji L=

(3) 相关系数法: ∑ ∑ ∑ = = = −⋅− = m k jjkiik m k jjkiik ij xxxx r 1 1 22 1 )()( , ),,2,1,( nji L=

(4) 指数相似系数法: ∑ = ⎪⎭ ⎪ ⎬ ⎫ ⎪⩩ ⎪ ⎨ ⎧ − −= m k k jkik ij s xx m r 1 2 2 , )( 4 3 exp 1其中∑ = = n i ikk xn x 1 1 , ∑ = −= n k kikk xxn s 1 2)( 1 , ),,2,1( mk L=

(5) 大小值法: ∑ ∑ = = ∨ ∧ = m k jkik ij xx r 1 1 )( , ),,2,1,,0( njixij L=>

(6) 算术平均值法