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Influence curves for the correlation coefficient

S.Mustonen (1990), Survo Users' Guide (1992), p. 289

See also: http://www.survo.fi/papers/corrcurves.pdf

Edit field:

   1 *
   2 *CORR DECA,3 / VARS=Height,Weight
   3 *Means, std.devs and correlations of DECA  N=48
   4 *Variable  Mean        Std.dev.
   5 *Height    186.9583    5.090493
   6 *Weight    85.56250    6.847600
   7 *Correlations:
   8 *             Height  Weight
   9 * Height       1.0000  0.8522
  10 * Weight       0.8522  1.0000
  11 *.......................................................................
  12 *r=0.85 mx=186.96 my=85.56 sx=5.09 sy=6.85 n=48
  13 *HEADER=Influence_curves_for_the_correlation_coefficient
  14 *PLOT z(x,y)=abs(r*(1-w)+u*v)/w 
  15 *  u=sqrt(n/(n*n-1))*(x-mx)/sx
  16 *  v=sqrt(n/(n*n-1))*(y-my)/sy
  17 *  w=sqrt((1+u*u)*(1+v*v))
  18 *TYPE=CONTOUR  ZSCALING=20,0     (1/0.05=20)
  19 *              SCREEN=NEG
  20 *XSCALE=150(10)220 YSCALE=40(10)130 SIZE=1164,1164
  21 *x=150,220,0.2    y=40,130,0.2
  22 *DEVICE=PS,INF.PS
  23 *.......................................................................
  24 *PLOT DECA,Height,Weight 
  25 *XSCALE=150(10)220 YSCALE=40(10)130 SIZE=1164,1164
  26 *HEADER=
  27 *DEVICE=PS,DECA.PS
  28 *.......................................................................
  29 *PRINT CUR+1,END 
  30 % 1500
  31 - picture INF.PS
  32 - picture DECA.PS
  33 *

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