Variable Transformations |
Figure 32.16 shows the transformations that are available
when you select Rank from the Family list.
The rank transformation of a variable is a new variable containing
the ranks of the corresponding values of .
Figure 32.16: Rank Transformations
There are actually four different rank functions, depending
on the options you select on the second page of the
wizard (Figure 32.17). If you select Assign
arbitrarily as the Rank of Ties option, then the SAS/IML RANK
function
is used to compute ranks. If you select Assign
to average, then the SAS/IML RANKTIE
function
is used. This is summarized in Table 32.6.
Figure 32.17: Rank Transformations
Name of | ||||
---|---|---|---|---|
Transformation | Order | Rank of Ties | New Variable | Equation |
rank(Y) | Ascending | Arbitrary | Rank_Y | rank(Y) |
Descending | Arbitrary | Rank_Y | rank(-Y) | |
Ascending | Average | Rank_Y | ranktie(Y) | |
Descending | Average | Rank_Y | ranktie(-Y) |
Copyright © 2008 by SAS Institute Inc., Cary, NC, USA. All rights reserved.