title: Testing for ouliers in a dataframe
body: <p>I am new to R and I tried to use a function that tests for outliers in  a large dataframe  with over 600 variables all numeric except for the last 2 columns. I tried the outlier function in the <code>outliers</code> package to test one column at a time, I ended with a numeric vector which I could not use. Is there a better way to identify all outliers in a dataframe.</p>
  
  <pre><code> myout &lt;- c()
      for (i in 1:dim(training)[2]){
       if (is.numeric(training[,i])) {
       myout &lt;- c(myout,outlier(training[,i]))  }
       }
  </code></pre>