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Note:   PROC FREQ can also be used to count the frequency of values in each BY-Group. A sort is not necessary when using PROC FREQ.

---

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.

/* Create sample data */

data old;
  input state $ accttot;
datalines;
ca     7000
ca     6500
ca     5800
nc     4800
nc     3640
sc     3520
va     4490
va     8700
va     2850
va     1111
;

proc sort data=old;
  by state;
run;

/* To get the number of observations in each group of states, start */
/* a counter on the first observation of each BY-Group. The last    */
/* observation in the BY-Group contains the total number of  	    */ 
/* observations and is output to the data set.                      */

data new;
  set old (drop= accttot);
  by state;
  if first.state then count=0;
  count+1;
  if last.state then output;
run;

proc print; 
run;

/* Alternative approach using PROC FREQ to generate the same output */

proc freq;                                                                                                                              
 tables state / out=new(drop=percent);                                                                                                  
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.

Obs    state    COUNT

 1      ca        3
 2      nc        2
 3      sc        1
 4      va        4

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