Online File

How to use this page

---

Rick Aster: Professional SAS Programming Shortcuts: Contents

Chapter 51
Program
Hierarchy linking

---

*
   tax.family: order, family
*;
proc sort data=tax.family out=work.level2;
   by order;
run;
*
   tax.genus: family, genus
*;
proc sort data=tax.genus out=work.level3;
   by order;
run;
*
   work.hier3: order, family, genus
*;
data work.hier3;
   merge work.level2 work.level3;
   by order;
run;
proc sort data=work.hier3;
   by genus;
run;
*
   tax.species: genus, species
*;
proc sort data=tax.species out=work.level4;
   by genus;
run;
*
   work.hier: order, family, genus, species
*;
data work.hier;
   merge work.hier3 work.level4;
   by genus;
run;