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 MACHART Statement

## Saving Summary Statistics

 See MACMA1 in the SAS/QC Sample Library

In this example, the MACHART statement is used to create a summary data set that can be read later by the MACONTROL procedure (as in the preceding example). The following statements read measurements from the data set CLIPS1 and create a summary data set named CLIPHIST:

```   title 'Summary Data Set for Gap Measurements';
proc macontrol data=clips1;
machart gap*day / span       = 3
outhistory = cliphist
nochart;
run;
```

The OUTHISTORY= option names the output data set, and the NOCHART option suppresses the display of the chart, which would be identical to the chart in Figure 21.2.

Figure 21.5 contains a listing of CLIPHIST.

 Summary Data Set for Gap Measurements

 day gapX gapS gapA gapN 1 14.904 0.18716 14.9040 5 2 15.014 0.09317 14.9590 5 3 14.866 0.25006 14.9280 5 4 15.048 0.23732 14.9760 5 5 15.024 0.26792 14.9793 5 6 15.126 0.12260 15.0660 5 7 15.220 0.23098 15.1233 5 8 14.902 0.17254 15.0827 5 9 14.910 0.19824 15.0107 5 10 14.932 0.24035 14.9147 5 11 15.096 0.25618 14.9793 5 12 14.912 0.16903 14.9800 5 13 15.138 0.15928 15.0487 5 14 14.798 0.26329 14.9493 5 15 14.944 0.20876 14.9600 5 16 14.896 0.09965 14.8793 5 17 14.734 0.22512 14.8580 5 18 15.046 0.24141 14.8920 5 19 14.702 0.17880 14.8273 5 20 14.788 0.16634 14.8453 5
Figure 21.5: The Summary Data Set CLIPHIST

There are five variables in the data set CLIPHIST.

• DAY contains the subgroup index.
• GAPX contains the subgroup means.
• GAPS contains the subgroup standard deviations.
• GAPA contains the subgroup moving averages.
• GAPN contains the subgroup sample sizes.

Note that the summary statistic variables are named by adding the suffix characters X, S, A, and N to the process GAP specified in the MACHART statement. In other words, the variable naming convention for OUTHISTORY= data sets is the same as that for HISTORY= data sets.

For more information, see "OUTHISTORY= Data Set" .

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