Scaling and Translation Transformations :: SAS/IML(R) Studio 13.1: User's Guide

Scaling and Translation Transformations

Figure 32.15 shows the transformations that are available when you select Scaling/Translation from the Family list. These transformations are used to center and scale a variable. Equations for these transformations are given in Table 32.5.

Figure 32.15: Scaling and Translation Transformations

Table 32.5: Description of Scaling and Translation Transformations

Transformation	Parameter	New Variable	Equation
	Default	Name of
center(Y)		Center_Y	$Y-\mbox{mean}(Y)$
stdize(Y)		Stdize_Y	See text.
reflect(Y;a)	$a=0$	Reflect_Y	$2a - Y$
a+b*Y	$a=0, b=1$	Linear_Y	$a+b Y$

The stdize(Y) transformation transforms the data to have zero mean and unit variance.

The reflect(Y) transformation reflects the data about the value $Y=a$ .

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