/************************************************************/
 /* The initial code/statements to read in the data to allow */
 /* students to complete problem set 4 problem 15            */
 /* This is not a full solution.                             */
 /************************************************************/

 /*  file:  ps4sas.sas */
 /*  data:  regdat.txt */
 /*  out:   NA     */

title 'SAS-Problem Set 4 -- Regression -- your name';

options nocenter;
data ps4; infile 'a:\regdat.txt';
   input case 1-2 x1 3-5 x2 6-8 x3 9-11 x4 12-14 y 15-17;

proc iml;
reset print;
edit ps4;
read all var {x1 x2 x3 x4} into x;

 /* remaining iml statements, etc. */