trough: Derive the local minimum 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

trough(coef, ...)

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

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

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

Arguments

coef	polynomial coefficients
...

Value

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

Examples

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

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