title: How to run bigglm function for large number of variables
body: <p>In <code>ffbase</code> (<a href="http://cran.r-project.org/web/packages/ffbase/ffbase.pdf" rel="nofollow">http://cran.r-project.org/web/packages/ffbase/ffbase.pdf</a>) there is the <code>bigglm</code> function:</p>
  
  <pre><code>bigglm.ffdf(formula, data, family = gaussian(), ...,
  </code></pre>
  
  <p>where <code>formula</code> is something like <code>Y~X</code>, assuming <code>Y</code> and <code>X</code> correspond to the <code>colnames</code> of <code>ffdf</code> object called <code>data</code>. </p>
  
  <p>What if I have 200 columns in <code>data</code> that I want to put on the RHS of the equation? Clearly I can't type <code>Y~X1+X2+....+X200</code>.</p>
  
  <p>How do I run <code>Y~X1+X2+....+X200</code> without typing out all 200 variables on the RHS?</p>