title: filter empty rows from a dataframe with R
body: <p>I have a dataframe with this structure : </p>
  
  <pre><code>Note.Reco  Reason.Reco  Suggestion.Reco  Contact
  9          absent       tomorrow          yes
  8                       tomorrow          yes
  8          present      today             no
  5                       yesterday         no
  </code></pre>
  
  <p>I would like to delete from this dataframe all the rows which have an empty value.</p>
  
  <p>The expected result : </p>
  
  <pre><code> Note.Reco  Reason.Reco  Suggestion.Reco  Contact
    9          absent       tomorrow          yes
    8          present      today             no
  </code></pre>
  
  <p>I try with this r instruction : </p>
  
  <pre><code>IRC_DF[!(is.na(IRC_DF$Reason.Reco) | IRC_DF$Reason.Reco==" "), ]
  </code></pre>
  
  <p>But I get the same input dataframe</p>
  
  <p>Any idea please?</p>
  
  <p>thank you</p>