title: Missing values and NaN's not allowed if 'na.rm' is FALSE
body: <p>I am just starting out using R, and I am trying to create a False Discovery Rate plot. However, there's an error message that I keep running into that seems very basic. I've search everywhere for a solution but haven't been able to find one.</p>
  
  <p>Here are the inputs and outputs:</p>
  
  <pre><code>&gt; melanoma.data &lt;- pamr.from.excel("MelanomaData.txt", 10, sample.labels=FALSE)
  pamr.menu(melanoma.data)
  
  1: pamr.train
  2: pamr.cv
  3: pamr.plotcv
  ...(other selections)
  
  Selection: 1
  Warning: a class contains only 1 sampleError in quantile.default(sd, offset.percent/100) : 
  missing values and NaN's not allowed if 'na.rm' is FALSE
  Error during wrapup: cannot open the connection
  </code></pre>
  
  <p>I converted "MelanomaData" from an excel file into a text file. I've searched through the data to make sure that there are no NA's or blank values. </p>
  
  <p>I'm at a lost as to what the problem could be, and any help would be greatly appreciated!    </p>