title: R programming language, where clause
body: <p>Within the R programming language, is it possible to use a where clause within ggplot?  If not, then within the R language to allow me to use a where clause?  For example, using the diamonds table can I only select records that the cut = "Good".  Cut is a field in the Diamond table.  The Cut field can equal "Fair", "Good", Very Good", "Premium", and "Ideal". </p>
  
  <pre><code>diamonds[1:5,]
  #   carat     cut   color  clarity    depth  table   price         x    y    z
  # 1  0.23   Ideal       E      SI2     61.5     55     326      3.95 3.98 2.43  
  </code></pre>
  
  <p>I want to use some type of conditional statement against a CSV read file.  But to keep my example simple, I using the diamond table as a typical example of my problem.  I want to filter cut = "Good" but to include fields related to the records = "Good".</p>
  
  <p>Thank you for any help to my question.</p>