Documentation Example 4 for Introduction to SEM
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: ICALEX3 */
/* TITLE: Documentation Example 4 for Introduction to SEM */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: measurement error model, Lord data */
/* PROCS: CALIS */
/* DATA: */
/* */
/* SUPPORT: yiyung UPDATE: September 14, 2009 */
/* REF: Introduction to SEM, Example 4 */
/* MISC: */
/****************************************************************/
data lord(type=cov);
input _type_ $ _name_ $ W X Y Z;
datalines;
n . 649 . . .
cov W 86.3979 . . .
cov X 57.7751 86.2632 . .
cov Y 56.8651 59.3177 97.2850 .
cov Z 58.8986 59.6683 73.8201 97.8192
;
proc calis data=lord;
path
W <=== F1,
X <=== F1,
Y <=== F2,
Z <=== F2;
pvar
F1 = 1.0,
F2 = 1.0,
W X Y Z;
pcov
F1 F2;
run;
proc calis data=lord;
path
W <=== F1,
X <=== F1,
Y <=== F2,
Z <=== F2;
pvar
F1 = 1.0,
F2 = 1.0,
W X Y Z;
pcov
F1 F2 = 1.0;
run;
proc calis data=lord;
path
W <=== F1,
X <=== F1,
Y <=== F1,
Z <=== F1;
pvar
F1 = 1.0,
W X Y Z;
run;
proc calis data=lord;
path
W <=== F1 = beta1,
X <=== F1 = beta1,
Y <=== F2 = beta2,
Z <=== F2 = beta2;
pvar
F1 = 1.0,
F2 = 1.0,
W X = 2 * theta1,
Y Z = 2 * theta2;
pcov
F1 F2;
run;
proc calis data=lord;
path
W <=== F1 = beta1,
X <=== F1 = beta1,
Y <=== F2 = beta2,
Z <=== F2 = beta2;
pvar
F1 = 1.0,
F2 = 1.0,
W X = 2 * theta1,
Y Z = 2 * theta2;
pcov
F1 F2 = 1.0;
run;
proc calis data=lord;
factor
F1 ===> W X,
F2 ===> Y Z;
pvar
F1 = 1.0,
F2 = 1.0,
W X Y Z;
cov
F1 F2;
run;
proc calis data=lord;
factor
F1 ===> W X = 2 * beta1,
F2 ===> Y Z = 2 * beta2;
pvar
F1 = 1.0,
F2 = 1.0,
W X = 2 * theta1,
Y Z = 2 * theta2;
cov
F1 F2;
run;
proc calis data=lord;
ram var=W X Y Z F1 F2,
_A_ 1 5,
_A_ 2 5,
_A_ 3 6,
_A_ 4 6,
_P_ 5 5 1.0,
_P_ 6 6 1.0;
fitindex on(only) = [chisq df probchi SRMSR RMSEA BENTLERCFI AGFI]
noindextype;
run;
proc calis data=lord;
ram var = W X Y Z F1 F2, /* W=1, X=2, Y=3, Z=4, F1=5, F2=6*/
_A_ 1 5 beta1,
_A_ 2 5 beta1,
_A_ 3 6 beta2,
_A_ 4 6 beta2,
_P_ 5 5 1.0,
_P_ 6 6 1.0,
_P_ 1 1 theta1,
_P_ 2 2 theta1,
_P_ 3 3 theta2,
_P_ 4 4 theta2,
_P_ 5 6 ;
run;