| Statistical Graphics Using ODS |
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Box-Cox Transformation Plot with PROC TRANSREG
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This example is taken from Example 90.2 of
Chapter 90,
The TRANSREG Procedure.
The following statements create a SAS data set that contains failure times for yarn:
proc format;
value a -1 = 8 0 = 9 1 = 10;
value l -1 = 250 0 = 300 1 = 350;
value o -1 = 40 0 = 45 1 = 50;
run;
data yarn;
input Fail Amplitude Length Load @@;
format amplitude a. length l. load o.;
label fail = 'Time in Cycles until Failure';
datalines;
674 -1 -1 -1 370 -1 -1 0 292 -1 -1 1 338 0 -1 -1
... more lines ...
;
The following statements set the output style to JOURNAL2 and run PROC TRANSREG:
ods listing style=journal2;
ods graphics on;
proc transreg data=yarn;
model BoxCox(fail / convenient lambda=-2 to 2 by 0.05) =
qpoint(length amplitude load);
run;
The log-likelihood plot in Figure 21.9 suggests a Box-Cox transformation with 
.
Figure 21.9
Box-Cox "Significant Effects" Using the JOURNAL2 Style
