title: How can I replace "map-09" by `map-09` in R? (from double quotes to single quotes)
body: <p>I tried with <code>gsub</code>, and <code>str_replace</code>, but I didn't get what I need.</p>
  
  <pre><code>gsub("\"", "\`", "map-09", fixed=TRUE) 
  </code></pre>
  
  <p>gives <code>"map-09"</code> and not <code>map-09</code> </p>
  
  <pre><code>str_replace("map-09","\"","\`")  
  </code></pre>
  
  <p>gives <code>"map-09"</code> and not <code>map-09</code> </p>