921  *************************************************
922  * file = assign.sas                             *
923  * The SAS program in this file creates new      *
924  * variables using assignment statements -       *
925  * several arithmetic operators and the          *
926  * SAS SUBSTR function.  The program assumes     *
927  * that the data set "htwt" has been created.    *
928  *************************************************;
929
930  options linesize=min;
931
932  *----------------------------------------*
933  * Create a new temporary SAS data set,   *
934  * same name, to add new variables        *
935  *----------------------------------------*;
936
937  data htwt;
938    set htwt;
939
940  *------------------------------------------------*
941  * 1. Create new variables that incorporate       *
942  *    calculations made on the existing variables *
943  *------------------------------------------------*;
944
945  ht2p    = (height + 2);  /* Add 2 to "height" */
946  agem1   = (age - 1);     /* Subtract 1 from "age" */
947  htfeet  = (height/12);   /* Convert inches to feet */
948                           /* Use the ROUND function to
949                              limit decimals to 1 */
950  htround = round(htfeet,0.1);
951  wtounce = (weight*16);   /* Convert pounds to ounces*/
952
953  *------------------------------------------------*
954  * 2. Create new variables that truncate the      *
955  *    values of existing variables.               *
956  *------------------------------------------------*;
957                           /* Starting at first value,
958                              display first 2 values*/
959  name1 = substr(name,1,2);
960
961                           /* Starting at first value,
962                              display first 3 values*/
963  name2 = substr(name,1,3);
964
965                           /* Starting at second value,
966                              display first 3 values */
967  name3 = substr(name,2,3);
968
969  run;

NOTE: Missing values were generated as a result of performing
      an operation on missing values.
      Each place is given by:
      (Number of times) at (Line):(Column).
      1 at 946:16
NOTE: The data set WORK.HTWT has 18 observations and 20
      variables.
NOTE: DATA statement used:
      real time           0.28 seconds


970
971  proc freq data=htwt;
972    tables height * ht2p * htfeet * htround /list missing;
973    tables age * agem1 /list missing;
974    tables weight * wtounce /list missing;
975    tables name * name1 * name2 * name3 /list missing;
976  title1 'The height/weight data set';
977  title2 'Check new variables against original variables';
978  run;

NOTE: PROCEDURE FREQ used:
      real time           0.70 seconds