Documentation Example 1 for Introduction to SEM
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: ICALEX5 */
/* TITLE: Documentation Example 1 for Introduction to SEM */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: Patterned Covariance Matrix */
/* PROCS: CALIS */
/* DATA: */
/* */
/* SUPPORT: yiyung UPDATE: September 10, 2009 */
/* REF: Introduction to SEM, Example 1 */
/* MISC: */
/****************************************************************/
data motor(type=cov);
input _type_ $ _name_ $ x1 x2 x3;
datalines;
COV x1 3.566 1.342 1.114
COV x2 1.342 4.012 1.056
COV x3 1.114 1.056 3.776
N . 36 36 36
;
proc calis data=motor;
mstruct var = x1-x3;
matrix _cov_ = phi
theta phi
theta theta phi;
run;
proc calis data=motor;
mstruct var = x1-x3;
matrix _cov_ = phi1
0. phi2
0. 0. phi3;
run;
proc calis data=motor covpattern=uncorr;
run;