repl.txt (1360B)
1 2 {{alias}}( W[, mx, my] ) 3 Returns an accumulator function which incrementally computes a moving 4 sample absolute Pearson product-moment correlation coefficient. 5 6 The `W` parameter defines the number of values over which to compute the 7 moving sample absolute correlation coefficient. 8 9 If provided values, the accumulator function returns an updated moving 10 sample absolute correlation coefficient. If not provided values, the 11 accumulator function returns the current moving sample absolute correlation 12 coefficient. 13 14 As `W` (x,y) pairs are needed to fill the window buffer, the first `W-1` 15 returned values are calculated from smaller sample sizes. Until the window 16 is full, each returned value is calculated from all provided values. 17 18 Parameters 19 ---------- 20 W: integer 21 Window size. 22 23 mx: number (optional) 24 Known mean. 25 26 my: number (optional) 27 Known mean. 28 29 Returns 30 ------- 31 acc: Function 32 Accumulator function. 33 34 Examples 35 -------- 36 > var accumulator = {{alias}}( 3 ); 37 > var ar = accumulator() 38 null 39 > ar = accumulator( 2.0, 1.0 ) 40 0.0 41 > ar = accumulator( -5.0, 3.14 ) 42 ~1.0 43 > ar = accumulator( 3.0, -1.0 ) 44 ~0.925 45 > ar = accumulator( 5.0, -9.5 ) 46 ~0.863 47 > ar = accumulator() 48 ~0.863 49 50 See Also 51 -------- 52