title: How do I color a R2HTML table cell based on the value of the data in the cell?
body: <p>I am using R2HTML to display a dataframe on an HTML page.</p>
  
  <p>I want the cells of the table to be colored based on the value of the data in the cell.</p>
  
  <p>What is the easiest way to do this?</p>
  
  <p>Many thanks.</p>