fit_curvature_max: Maximum curvature analysis (elbow detection)

In daltoolbox: Leveraging Experiment Lines to Data Analytics

Maximum curvature analysis (elbow detection)

Description

Computes a smoothing spline over a sequence and returns the location/value of maximum curvature, often used as an "elbow" detector.

Usage

fit_curvature_max()

Value

returns an object of class fit_curvature_max, which inherits from the fit_curvature and dal_transform classes. The object contains a list with the following elements:

• x: The position in which the maximum curvature is reached.

• y: The value where the the maximum curvature occurs.

• yfit: The value of the maximum curvature.

Examples

x <- seq(from=1,to=10,by=0.5)
dat <- data.frame(x = x, value = -log(x), variable = "log")
myfit <- fit_curvature_max()
res <- transform(myfit, dat$value)
head(res)

daltoolbox documentation built on Nov. 5, 2025, 7:09 p.m.