SAS - Create Dummy or Indicator variables for codes

SAS_transpose_to_create_dummy_variables.sas

/*Modified from this question on SO: https://stackoverflow.com/questions/65219061/sas-loop-create-columns-from-the-records-which-are-having-a-value
Initial answer from Richard D.
*/

*sample data;
data have;
input id found  code $;
datalines;            
1   1      001
2   0      v58
3   1      v58
4   1      003
5   0      v58
;

*transpose and move found to the inner values;
proc transpose data=have out=temp(drop=_name_) prefix=code_;
  by id;
  id code;   * column name becomes <prefix><code>;
  var found;
run;

* missing occurs when an id was not diagnosed with a code;
* if that means the flag should be zero (for logistic modeling perhaps)
* the missings need to be changed to zeroes;

proc stdize data=temp out=want missing=0 reponly;
var code_:;
run;