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

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Accepted Answer

Ben Drebing
Ben Drebing on 21 Dec 2017
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);

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