title: Plotting a data.frame in R
body: <p>i'm new to R and i need advise in plotting a dataframe in R which looks like this:</p>
  
  <pre><code>         V1          V2         V3          V4         
            1       Mazda     Toyota     Peugeot
     Car1.txt 0,507778837 0,19834711 0,146892655
     Car2.txt 0,908717802 0,64214047 0,396508728
  </code></pre>
  
  <p>i would like to plot this dataframe ( which in fact has 7 columns and 95 rows) 
  in a single graph, where v2, v3, v4 represent a line in a different color and named like the car names , V1 as label of the x-axis, whereas the y-axis is in the range[0,1].</p>
  
  <p>I have really no clue how to do this, so i'm very thankful for any advice</p>