title: How to subset a local macro in Stata
body: <p>Suppose I have a local macro containing some variable names</p>
  
  <pre><code>local indep "cat dog pig"
  </code></pre>
  
  <p>How do I drop <code>pig</code> from the macro, if I want the macro to contain only <code>cat</code> and <code>dog</code>?</p>