title: ggplot equivalent for matplot
body: <p>Is there an equivalent in ggplot2 to plot this dataset? I use matplot, and read that qplot could be used, but it really does not work.
  <a href="https://stackoverflow.com/questions/12047787/ggplot2-version-of-matplot">ggplot/matplot</a></p>
  
  <pre><code>data&lt;-rbind(c(6,16,25), c(1,4,7), c(NA, 1,2), c(NA, NA, 1))
  as.data.frame(data)
  matplot(data, log="y",type='b', pch=1)
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/m9mxa.jpg" alt="plot columns / each line"></p>