Hi all, i have fitted a Four Parameters Logistic Regression for my X and Y data. i want to find the local slope of each data point, i would appreciate if somebody can help me on this , the attached image shows the fit

[Duminda Vidana Gamage]

Thank you Ben , it worked

Answer 1

[Ben Drebing]

Do you mean you want to calculate the slope at each point along the curve? If your curve is given by x and y, then you can get the slope at each point along the curve by doing

 slopes = diff(y) ./ diff(x);