title: max and min functions that are similar to colMeans
body: <p>I am wondering if there are high speed min and max function that works on columns similarly to colMeans?</p>
  
  <p>For 'max', although I can simulate the behavior with 'apply' such as the following:</p>
  
  <pre><code>colMax &lt;- function (colData) {
      apply(colData, MARGIN=c(2), max)
  }
  </code></pre>
  
  <p>It seems a lot slower than the colMeans in the base package.</p>