title: Plot vectors of different length with ggplot2
body: <p>I've got 8 data vectors (MAP scores) of different length (different amount of documents rated), from 80 to 500. How do I read them to R and plot them to the same length in ggplot2? Consider them a different amount of datapoints ranging from 0 to 1. They should be scaled down/up so they fit into the same graph. And add a smoother to the picture. The scores range from 0 to 1.
  As example, I've got the vectors</p>
  
  <pre><code>vec1 = [1,0.8,0.6,0.8,0.6,0.6] # =&gt; +
  vec2 = [1,0.8,0.6,0.4] # =&gt; *
  </code></pre>
  
  <p>and the plot should look like:</p>
  
  <pre><code>+   
    +*  +
      +  *+  +
             *
  </code></pre>
  
  <p>but with lines.</p>