Measuring Similarity of Gene Expression Euclidean (L 2 ) distance Manhattan (L 1 ) distance L m : (|x 1 -x 2 | m +|y 1 -y 2 | m ) 1/m L ∞ : max(|x 1 -x 2 |,|y 1 -y 2 |) Inner product: x 1 x 2 +y 1 y 2 Correlation coefficient Spearman rank correlation coefficient (x 1, y 1 ) (x 2,y 2 )
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