title: Putting log symbols in ggplot2 text
body: <p>How can I insert a log symbol, in a ggplot text?</p>
  
  <p>These were my tries:</p>
  
  <pre><code>myLabel = c("log_a b","log{a}")
  
  ggplot(
      data=data.frame(x=0,y=0)
    ) + geom_point(
      aes(x=x,y=y)
    ) + annotate(
      'text', 
      x = 0, y = 0, 
      parse = TRUE,size=10,
      label = myLabel[2])  # here
  </code></pre>
  
  <p>Note: The above was taken from <a href="https://stackoverflow.com/questions/15125628/putting-mathematical-symbols-and-subscripts-mixed-with-regular-letters-in-r-ggpl">this</a> post</p>