title: How to plot multiple grouped data in one excel scatter plot with lines
body: <p>I am facing some difficulties with plotting grouped data (by index) in one graph (scatter plot with lines) in Excel, and I will appreciate a lot your help.</p>
  
  <p>My data are in three columns:
  The first column is the index of the data or the group (i.e. a unique number for every set of data)
  the second column is the time
  and the third column is the data</p>
  
  <pre><code>Group, Time, Data
  1   1   12
  1   3   12
  1   4   28
  1   8   56
  1   12  37
  1   24  40
  1   48  34
  2   0   7
  2   1   14
  2   4   6
  2   8   63
  2   12  4
  2   24  35
  2   48  3
  </code></pre>
  
  <p>und so on.</p>
  
  <p>and I want to plot the data vs. time for each index i.e. data group alone, but on the same graph. </p>
  
  <p>Until now, I was always doing it manually by adding each data set separately to the graph. But I think there should be a more clever and easier way to do it, especially that sometimes I have a lot of data (index number can reach 70 or 80).</p>
  
  <p>Thanks a lot in advance.</p>