Hi Edward. I would like to produce some graphs with more points than the standard graphs. Particularly, I am looking for something similar to make an numpy arange from min to max of cpmg frequencies, and interpolate with 50 points? Calculate the R2eff values from the fitted parameters of the model equation at populate a list of y_values. That would produce more interesting graphs to look at, than graphs with only 10-20 points. Is there a way to call the model function? Troels Emtekær Linnet