Description Usage Arguments Details Value Author(s) References See Also Examples

It finds the UIK estimation for elbow or knee point of a curve, see [1] for details.

1 | ```
uik(x, y)
``` |

`x` |
The numeric vector of x-abscissas, must be of length at least 4. |

`y` |
The numeric vector of y-abscissas, must be of length at least 4. |

Given the x, y numeric vectors it first checks the curve by using `check_curve`

and classifies it as convex, concave or convex/concave, concave/convex.

It returns the x-abscissa which is the UIK estimation for the knee point.

Demetris T. Christopoulos

[1] Christopoulos, Demetris T., Introducing Unit Invariant Knee (UIK) As an Objective Choice for Elbow Point in Multivariate Data Analysis Techniques (March 1, 2016). Available at SSRN: https://ssrn.com/abstract=3043076 or http://dx.doi.org/10.2139/ssrn.3043076

`check_curve`

and `d2uik`

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |

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