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Rick Aster: Professional SAS Programming Secrets: Contents

Chapter 9
Program 9b
Creating and changing variables

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  Professional SAS Programming Secrets
  Program 9b
  Creating and changing variables (1)
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data work.planet;
   length planet $ 16 sequence mass radius 8;
   infile planets dsd;
   input planet sequence mass radius;
   if mass < 0 then mass = .;
   if radius < 0 then radius = .;
   else diameter = radius*2;
   if radius > 0 and not missing(mass) then
       density = mass*10e9/(4/3*constant('pi')*radius**3);
   else density = .;
run;