title: How can I select human miRNA from affy chip while analyzing data using R?
body: <p>I am new to R and want to analyze miRNA expression from a data set of 3 groups. Can anyone help me out.  </p>
  
  <p>In this case I got other miRNAs(on affy chips) as top expressed genes. Now I want to select only human miRNAs. Please help me</p>
  
  <p>Thanks in advance</p>