inverse_with_uniroot {nhppp}

Numerically evaluate the inverse of a function at a specific point

Description

Numerically evaluate the inverse of a function at a specific point

Usage

inverse_with_uniroot(
  f = f,
  y,
  min_x = 0,
  max_x = 1,
  min_y = f(min_x),
  max_y = f(max_x)
)

Arguments

f

(function) the function to be inverted; must be continuous and increasing

y

(scalar, double) the f(x)=y value in which to evaluate the inverse

min_x

(scalar, double) the min of the domain of f()

max_x

(scalar, double) the max of the domain of f()

min_y

(scalar, double) the min in the range of f()

max_y

(scalar, double) the max in the range of f()

Value

(scalar, double) vector of x=f^(-1)(y): the inverted value

Examples

inverse_with_uniroot(f = function(x) {
  2 * x
}, y = 0.5)