title: "NAs introduced by coercion" during Cluster Analysis in R
body: <p>Guys I'm new to this language ,I'm running cluster analysis on a data frame but when I calculate the distance I get this warning "NAs introduced by coercion".  What does this mean?</p>
  
  <pre><code>d &lt;- dist(as.matrix(mydata1))
  
    Warning message:
  In dist(as.matrix(mydata1)) : NAs introduced by coercion
  </code></pre>
  
  <p>My data sample is </p>
  
  <pre><code>Metafamily     Total         July cpc      July cse_pla    July offline   July organic  
  xerox 8560     275.829417    0.20943223    0.032628862     0.169210813    0.1130048 
  office-supplie  246.9125664  0.057833047   0.020209909     0.535358617    0.136165617
  </code></pre>
  
  <p>In this apart from Metafamily column all columns are numeric in class.</p>
  
  <p>Guys please help me out from this issue.</p>