Find elbow in a 2D curve represented by a list of ordered values
Usage
find_elbow(values)
Value
index and value of the selected point
Arguments
values
vector of values in decreasing order
Details
This function finds the point with maximum distance from the line between
the first and last points.
Adapted from StackOverflow:
http://stackoverflow.com/questions/2018178/finding-the-best-trade-off-point-on-a-curve