title: How do I get R to spit out the critical value for F-statistic based on ANOVA?
body: <p>The one thing missing from an ANOVA analysis in R is that it doesn't automatically display the critical value. Everything else is given. I can tell that my F-value is way higher than it should be, but I want to know the margin at where the cut-off is.  There's this online calculator that yields the critical value for F statistics based on the degrees of freedom, but I want R to do this. <a href="http://www.danielsoper.com/statcalc/calculator.aspx?id=4" rel="nofollow">http://www.danielsoper.com/statcalc/calculator.aspx?id=4</a></p>
  
  <p>How do I do it?</p>
  
  <p>Example:</p>
  
  <pre><code>&gt;anova(anovaModel.model1)
                            Df  Sum Sq   Mean Sq F value    Pr(&gt;F)    
  data$SIZE    4 0.1193 0.027926  22.056 4.55e-16 ***
  Residuals               1372 1.994 0.001352            
  &gt;F(variance.mod1)    #??
  &gt;F(4,1372 )          #Something like this?
  </code></pre>