title: Making a boxplot comparing two variables
body: <p>I have census data about Salary and Age. There are two possible datapoints under the Salary column (under 50k or over 50k). There are several possible datapoints for the age column. I tried using the following command</p>
  
  <pre><code>    boxplot(census$Salary, census$Age)
  </code></pre>
  
  <p>but that didn't return a boxplot that made sense.</p>
  
  <p>Any suggestions? Thanks in advance</p>