title: boxplot of vectors with different length
body: <p>I have a matrix of 2 columns. I would like boxplot each of these columns but each has different number of entries.</p>
  
  <p>For example, first column has 10 entries and the second column has 7 entries. The remaining 3 of the second column is given zero.</p>
  
  <p>I would like to plot these side by side for comparison reasons.</p>
  
  <p>Is there a way to tell R to boxplot the whole column 1 and only the first 7 entry for column 2? </p>