shoulder: Derive the local maximum of a third degree polynomial

In schmettow/uncanny: researching the uncanny valley phenomenon

Description

Takes four polynomial parameters as input and derives the local minimum if it exists.

Usage

shoulder(coef, ...)

## S3 method for class 'numeric'
shoulder(coef)

## S3 method for class 'matrix'
shoulder(coef, ...)

## S3 method for class 'data.frame'
shoulder(coef)

Arguments

coef	polynomial coefficients
...

Value

position of the local maximum, NA if it does not exist

Examples

shoulder(c(-1, -4, 3, 1))

schmettow/uncanny documentation built on Oct. 30, 2020, 5:44 p.m.