title: geom_text two colors in R
body: <p>I have a <code>ggplot</code> with a <code>geom_text()</code>:</p>
  
  <pre><code>geom_text(y = 4, aes(label = text))
  </code></pre>
  
  <p>The variable text has the following format:</p>
  
  <pre><code>number1-number2
  </code></pre>
  
  <p>I want to know if it is possible to define a color for the number1 and another color for number2 (example: red and green color)</p>
  
  <p>Thanks!</p>