title: Print unicode character string in R
body: <p>I entered a text string in <code>.csv</code> file , which includes unicode symbols as: <code>\U00B5</code> g/dL. 
  In <code>.csv</code> file as well as read in R data frame:</p>
  
  <p><img src="https://i.stack.imgur.com/idgN0.png" alt="enter image description here"></p>
  
  <pre><code>test=read.csv("test.csv")
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/fbObT.png" alt="enter image description here"></p>
  
  <p><code>\U00B5</code> would produce the micro sign- µ. R read it into data file as it is (<code>\U00B5</code>). However when I print the string it shows as <code>\\U00B5 g/dL</code>.<br>
  Alternatively, manually entering the code works fine.</p>
  
  <pre><code>varname &lt;- c("a", "b", "c")
  labels &lt;- c("A \U00B5 g/dL", "B \U00B5 g/dL", "C \U00B5 g/dL")
  df &lt;- data.frame(varname, labels)
  test &lt;- data.frame(varname, labels)
  test
  #  varname   labels
  #  1       a A µ g/dL
  #  2       b B µ g/dL
  #  3       c C µ g/dL
  </code></pre>
  
  <p>I wonder how could I get rid of the escape sign <code>\</code> in this case and have it print out the symbol. 
  Or, if there another way to print out the symbol in R.</p>
  
  <p>Thank you very much for this help! </p>