title: Ignoring weekends when using time series operators in Stata
body: <p>Is it possible to tell Stata to ignore Saturdays and Sundays when using time series operators such as <code>L</code> and <code>F</code>?</p>
  
  <p>For example, consider this dataset:</p>
  
  <pre><code>date   price    L1.price / L2.price (currently)    L1.price / L2.price (wanted!)
  tue    5        . / .                              . / .
  wed    .        5 / .                              5 / .
  thu    7        . / 5                              . / 5
  fri    3        7 / .                              7 / .
  sat                        [ignore this row]
  sun                        [ignore this row]
  mon    1        . / .                              3 / 7
  tue    9        1 / .                              1 / 3
  </code></pre>
  
  <p>The third column illustrates Stata's current behavior.</p>
  
  <p>I want it to behave like in the last column.</p>
  
  <p>Is this possible?</p>