Details for PROC PRINQUAL
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: PRQDET */
/* TITLE: Details for PROC PRINQUAL */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: principal components */
/* PROCS: PRINQUAL */
/* DATA: */
/* */
/* SUPPORT: saswfk UPDATE: July 25, 2010 */
/* REF: PROC PRINQUAL, DETAILS */
/* MISC: */
/****************************************************************/
ods graphics on;
* Generate Three-Dimensional Data;
data X;
do X1 = -1 to 1 by 0.02;
X2 = X1 ** 3 + 0.05 * normal(7);
X3 = X1 ** 5 + 0.05 * normal(7);
output;
end;
run;
proc sgscatter data=x;
plot x1*x2 x1*x3 x3*x2;
run;
* Try to Straighten the Scatter Plot;
proc prinqual data=X n=1 maxiter=2000 plots=transformation out=results;
title 'Linearize the Scatter Plot';
transform spline(X1-X3 / nknots=9);
run;
* Plot the Linearized Scatter Plot;
proc sgscatter data=results;
plot tx1*tx2 tx1*tx3 tx3*tx2;
run;