Labeling Signaled Points with a Variable
[See SHWTSC1 in the SAS/QC Sample Library]If a test is signaled at a particular point, the point is labeled by default with the index of the test, as illustrated in Figure 13.43.63. You can use the TESTLABEL= option to specify a variable in the input data set whose values provide the labels, as illustrated by the following statements:
ods graphics on;
title 'Analysis of Assembly Data';
proc shewhart history=Assembly;
xrchart Offset * Sample / mu0 = 20
sigma0 = 2.24
limitn = 5
alln
tests = 1 to 4
testlabel = ( comment )
vaxis = 16 to 24 by 2
split = '/';
label OffsetX = 'Avg Offset in cm/Range';
run;
The labels are shown in Figure 13.43.66. It is often helpful to specify a variable with the TESTLABEL= option that provides operator comments or other information that can aid in the identification of special causes.
Output 13.43.66
Labeling Points with a TESTLABEL= Variable
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