title: Plotting color scatterplots matrix
body: <p>I`m using RStudio v 0.97. I want to get color scatterplot matrix, here is my code:</p>
  
  <pre><code>dt&lt;- impact[c(3,4,7,8)] 
  dt.r &lt;- cor(dt)
  dt.color &lt;- dmat.color(dt.r)
  dt.order&lt;- order.single(dt.r)
  
  cpairs(dt, dt.order, panel.controls = dt.color,  main= "Scatterplots")
  </code></pre>
  
  <p>But my output is black&amp;white scatterplot and warning: "There were 50 or more warnings (use warnings() to see the first 50)"</p>
  
  <p>How to fix this? </p>