, , () () .
, (X Y) P(XY) =P(X) P(Y), X Y . , !?
? - . , , , .
: Y ( My Sy) X ( Mx Sx)
Rxy= . {2 - 11}
-1 +1 .
, X Y . , , , Rxy = 0, . , Rxy = 0. , Rxy = 1, Y X. .
,
xy= S (X - Mx) (Y - My)
X Y : -, ( X, Y) , -, .
, .
. R :
W = 0.5 Ln[(1 + R)/(1-R)] {2 - 12}
W, .
( 2) .
X, Y Z - , Mx, My, Mz Sx, Sy, Sz.
Rxy, Rxz, Ryz . - ! . . , Z X Y
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Rxy.z = {2 - 13}
, , ? Rx.yz, Ry.zx, Rz.xy, .
- .
, , , , , .
"" . . .
- Y X () ().