pathreg.sas

SAS for Windows统计分析系统教程,里面有源码

options nodate nonumber;
title 'Path Analysis';
DATA pathreg(type=corr);
  input _type_ $ _name_ $ x1-x5;
CARDS;
CORR  x1  1.00  .635  .451  .344  .347
CORR  x2   .   1.00   .494  .424  .455
CORR  x3   .    .    1.00   .556  .579
CORR  x4   .    .     .    1.00   .619
CORR  X5   .    .     .     .    1.00
N     df   120  120   120   120    120
;
title2 'Below is full model of path analysis';
PROC REG;
  MODEL x2=x1/STB;
  MODEL x3=x1 x2/STB;
  MODEL x4=x1 x2 x3/STB;
  MODEL x5=x1 x2 x3 x4/STB;
run;
title2 'Below is restricted model of path analysis';
PROC REG;
  MODEL x2=x1/STB;
  MODEL x3=x1 x2/STB;
  MODEL x4=x3/STB;
  MODEL x5=x3 x4/STB;
run;