findCutoffFirstDerivative: Finds the point where the derivative is a fraction of the steepest slope
Description
Finds the point where the derivative is a fraction of the steepest slope
Usage
findCutoffFirstDerivative(x, y, slope_ratio = 0.5)
Arguments
x
x coordinates of points around the curve
y
y coordinates of points around the curve
slope_ratio
the fraction of the steepest slope that defines knee point
Value
(x, y) coordinates of the knee point