title: How to fit and calculate the average for data sets in xmgrace?
body: <p>I have a function which I like to fit it to a function of Y=a+(1-a)exp(-x/T) to get the T value for it.</p>
  
  <p>I want to do these using Xmgrace but I do not know how.</p>
  
  <p>Thanks for your suggestions.</p>