* Two covariate example done in class on Septermber 26, 2017;

Libname S3A3 "D:\STAT 3A03\Fall 2017\Data";
* Replace the path above with the path to whatever folder you use for this course;

PROC IMPORT out=S3A3.csdata
   datafile="D:\STAT 3A03\Fall 2017\Data\CSData.txt"
       DBMS=DLM
       REPLACE;
   Getnames=yes;
   Datarow=2;
run;

PROC REG Data=S3A3.csdata plots=none;
   Model GPA=HSM;
   Plot GPA*HSM;
run;
quit;

PROC REG Data=S3A3.csdata plots=none;
   Model GPA=SATM;
   PLOT GPA*SATM;
run;
quit;

PROC REG Data=S3A3.csdata plots=none;
   Model GPA=HSM SATM;
run;
quit;

PROC GPLOT Data=S3A3.csdata;
   Plot SATM*HSM;
run;

PROC REG Data=S3A3.csdata plots=none;
   Model SATM=HSM;
   Plot SATM*HSM;
run;
quit;


* The 3 models described on Slide 3-7;
PROC REG Data=S3A3.csdata plots=none;
   Model GPA=HSM;
   Output Out=csdata_out1
      Residual=e1;
run;
quit;

PROC REG Data=csdata_out1 plots=none;
   Model SATM=HSM;
   Output Out=csdata_out2
      residual=e2;
run;
quit;

PROC GPLOT Data=csdata_out2;
   Plot e1*GPA;
   Plot e2*SATM;
run;

PROC REG Data=csdata_out2 plots=none;
   Model e1=e2 /noint;
   Plot e1*e2;
run;
quit;