Documentation Example 20 for PROC CALIS
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: CALEX04 */
/* TITLE: Documentation Example 20 for PROC CALIS */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: confirmatory factor model, cognitive abilities */
/* PROCS: CALIS */
/* DATA: */
/* */
/* SUPPORT: yiyung UPDATE: August 27, 2007 */
/* REF: PROC CALIS, Example 20 */
/* MISC: */
/****************************************************************/
title "Confirmatory Factor Analysis Using the FACTOR Modeling Language";
title2 "Cognitive Data";
data cognitive1(type=cov);
_type_='cov';
input _name_ $ reading1 reading2 reading3 math1 math2 math3
writing1 writing2 writing3;
datalines;
reading1 83.024 . . . . . . . .
reading2 50.924 108.243 . . . . . . .
reading3 62.205 72.050 99.341 . . . . . .
math1 22.522 22.474 25.731 82.214 . . . . .
math2 14.157 22.487 18.334 64.423 96.125 . . . .
math3 22.252 20.645 23.214 49.287 58.177 88.625 . . .
writing1 33.433 42.474 41.731 25.318 14.254 27.370 90.734 . .
writing2 24.147 20.487 18.034 22.106 26.105 22.346 53.891 96.543 .
writing3 13.340 20.645 23.314 19.387 28.177 38.635 55.347 52.999 98.445
;
proc calis data=cognitive1 nobs=64 modification;
factor
Read_Factor ===> reading1-reading3 ,
Math_Factor ===> math1-math3 ,
Write_Factor ===> writing1-writing3 ;
pvar
Read_Factor Math_Factor Write_Factor = 3 * 1.;
cov
Read_Factor Math_Factor Write_Factor = 3 * 0.;
run;
proc calis data=cognitive1 nobs=64 modification;
factor
Read_Factor ===> reading1-reading3 ,
Math_Factor ===> math1-math3 ,
Write_Factor ===> writing1-writing3 ;
pvar
Read_Factor Math_Factor Write_Factor = 3 * 1.;
cov
Read_Factor Math_Factor Write_Factor /* = 3 * 0. */;
run;