PV（プロモーションビデオ）・MV（ミュージックビデオ）やライブ動画を無料で視聴できる-MyDo(マイ動画)音楽情報館

Correlation & Covariance について・・・

Covariance is a measure of relationship (or co-movement) between two variables. Correlation is just the translation of covariance into a UNITLESS measure that we can understand (-1.0 to 1.0)