title: change NA to missing value in SAS
body: <p>I have a SAV file with 5 variables. in two of them I have NA values (written as string. I need to convert NA to "empty value" </p>
  
  <p>thought of using "if then rename" options but with no success as it prints out only one observation or keeps the NA values as they are.
  please assist.</p>
  
  <pre><code>data QUS;
  if happy=NA then rename happy="";
  if educ=NA then rename educ="";
  run;
  proc print data=QUS;
  run;
  </code></pre>