title: R: "ExpressionSet" data not loading
body: <p>I wanted to convert my dataframe of "array data" into an expressionSet. I followed this link and managed to get the same ( <a href="https://stackoverflow.com/questions/7363991/expressionset-phenodata">Expressionset - phenodata</a> ) .</p>
  
  <p>So i here get my expressionSet</p>
  
  <pre><code>&gt; test
  ExpressionSet (storageMode: lockedEnvironment)
  assayData: 1000 features, 733 samples
    element names: exprs
  protocolData: none
  phenoData
    sampleNames: X8261 X8164 ... X7727 (733 total)
    varLabels: Batch gender
    varMetadata: labelDescription
  featureData: none
  experimentData: use 'experimentData(object)'
  Annotation:
  </code></pre>
  
  <p>But now i would like to load/use this object/data inorder to use this for a particular R package "PVCA" (<a href="http://www.bioconductor.org/packages/2.12/bioc/vignettes/pvca/inst/doc/pvca.pdf" rel="nofollow noreferrer">http://www.bioconductor.org/packages/2.12/bioc/vignettes/pvca/inst/doc/pvca.pdf</a>) , so I do this:</p>
  
  <pre><code>&gt; data(test)
  Warning message:
  In data(test) : data set âtestâ not found
  </code></pre>
  
  <p>I get this warning "data not found". Can anyone help me know why do I get this? And what can I do to load my data and overcome this ? </p>
  
  <p>Thanks in advance..</p>