title: How can I include several qqplots with ggplot2 using facet_wrap
body: <p>I am using this code, and I can get the qqplot for each column of my data. However, I do not know how to combine the <code>qqplots</code> together by <code>facet_wrap</code> with <code>ggplot2</code></p>
  
  <p>The data</p>
  
  <pre><code>&gt; head(X)
    V1   V2   V3   V4   V5
  1  1 1889 1651 1561 1778
  2  2 2493 2048 2087 2197
  3  3 2119 1700 1815 2222
  4  4 1645 1627 1110 1533
  5  5 1976 1916 1614 1883
  6  6 1712 1712 1439 1546
  </code></pre>
  
  <p>I need to to do a qqplot for V2,V3,V4,V5 I am using this code for each variable</p>
  
  <pre><code>q1&lt;-qqnorm(X$V2, pch = 20, main="QQPlot for V2")
  </code></pre>
  
  <p>Also I can do it by this</p>
  
  <pre><code>ggplot(X, aes(sample = V2)) +stat_qq() + stat_qq_line()
  </code></pre>
  
  <p>I do not know how to use facet in ggplot2 to combine all the qqplots</p>