title: Stacked Bar Plot in R
body: <p>I've looked at the similar questions on here regarding stacked bar plots in R, but I'm still not having any luck.</p>
  
  <p>I have created the following data frame:</p>
  
  <pre><code>        A   B   C   D   E   F    G
       1 480 780 431 295 670 360  190
       2 720 350 377 255 340 615  345
       3 460 480 179 560  60 735 1260
       4 220 240 876 789 820 100   75
  </code></pre>
  
  <p>A:G represents the x-axis and the y-axis would be duration (seconds). 
  How would I go about stacking the following data in R?</p>
  
  <p>Thank you very much in advance for your time and help.  </p>