title: how to recode (and reverse code) variables in columns with dplyr
body: <p>I am picking up R again after last using it in 2013. I am getting used to using dplyr, but I am running into a problem with a simple task.
  I  have a table that looks like</p>
  
  <pre><code>Participant Q1       Q2      Q3     Q4       Q5
  1           agree  neutral   NA    Disagree  Agree
  2           neutral agree    NA     NA       NA
  </code></pre>
  
  <p>My goal</p>
  
  <pre><code>   Participant Q1       Q2      Q3     Q4       Q5
      1           3       2       NA      1       3
      2           2       1       NA     NA       NA
  </code></pre>
  
  <p>I want to be able to change the categorical value to a numerical value for columns Q1:Q5, but all the examples that I see of using recode for dplyr work for rows and no columns. (I might be missing something in the examples). I then want to be able to pick column Q1 and Q2 and reverse code it. </p>
  
  <p>I am trying to learn to do this in dplyr if possible</p>
  
  <p>Thanks </p>