Environment for creative processing of text and numerical data

Contour ellipses and a trend line

S.Mustonen, Survo Users' Guide (1992), pp. 264-265

Edit field:

   1 *
   2 *FILE CREATE BINORM,8,2 
   3 *Sample of 1000 observations from a bivariate normal distribution
   4 *with E(X)=E(Y)=0 S(X)=S(Y)=1 R(X,Y)=0.7
   5 *FIELDS:
   6 *1 N 4 X
   7 *2 N 4 Y
   8 *END
   9 *
  10 *FILE INIT BINORM,1000 
  11 *
  12 *VAR X,Y TO BINORM 
  13 *R=0.7
  14 *U=probit(rnd(1)) V=probit(rnd(1))
  15 *X=U Y=R*U+sqrt(1-R*R)*V
  16 *
  17 *CORR BINORM,CUR+1 
  18 *Means, std.devs and correlations of BINORM  N=1000
  19 *Variable  Mean        Std.dev.
  20 *X        -0.023622    1.008356
  21 *Y        -0.023204    1.010290
  22 *Correlations:
  23 *             X       Y
  24 * X            1.0000  0.7177
  25 * Y            0.7177  1.0000
  26 *.......................................................................
  27 *PLOT BINORM,X,Y 
  28 *SCALE=-4(1)4
  29 *CONTOUR=[line_width(0.5)],0,0.5,0.9,0.99
  30 *TREND=[line_width(2)],0
  31 *SIZE=1164,1164 DEVICE=PS
  32 *.......................................................................
  33 *

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