Sample 51926: Use the CLASSDATA= option in PROC MEANS to limit processing to class variable values having a minimum number of observations
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The CLASSDATA= option in PROC MEANS enables you to specify a SAS® data set that contains the combinations of class variable values that must be present in the input data set. You can use the CLASSDATA= option to limit processing to class variable values having a minimum number of observations.
The example code on the Full Code tab uses the SQL procedure to create a data set that contains the number of observations for each group value, with the condition that the group should have at least 20 observations. Use that data set with the CLASSDATA= option and also specify the EXCLUSIVE option to limit the results to only those values of the GROUP variable that are in the GRPCLASS data set.
These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.
The example code below uses the SQL procedure to create a data set that contains the number of observations for each group value, with the condition that the group should have at least 20 observations. Use that data set with the CLASSDATA= option and also specify the EXCLUSIVE option to limit the results to only those values of the GROUP variable that are in the GRPCLASS data set.
/* Create a sample data set */
data test;
length group $ 8;
do group='AAA','BBB','CCC','DDD','EEE';
do i=1 to 3;
do j=1 to int(ranuni(i)*14);
result=int(ranuni(j)*1234);
output;
end;
end;
end;
run;
/* Create a data set containing groups */
/* that have 20 or more observations. */
proc sql noprint;
create table grpclass
as select count(group) as count,
group as group
from test
group by group
having count(group) ge 20;
quit;
proc print data=grpclass;
run;
/* Groups AAA and EEE have fewer than 20 observations. */
/* Use the GRPCLASS data set with the CLASSDATA= option. */
proc means data=test mean maxdec=2
classdata=grpclass exclusive;
class group;
var result;
run;
These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.
| Type: | Sample |
| Date Modified: | 2014-01-14 15:35:08 |
| Date Created: | 2013-12-29 13:17:42 |
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