ll_zero_finder2: Zero finding function

In genpwr: Power Calculations Under Genetic Model Misspecification

Description

Finds the zeros of a function af. Alternative to uniroot, designed specifically to work with the genpwr package. Finds multiple zeros if a function has more than one in the given range.

Usage

ll_zero_finder2(af, ii = 6, lower = 0, upper = 1, qdelta = 27)

Arguments

af	The function for which to find the zero(s)
ii	Number of iterations. The more iterations, the more accuracy. It is recommended that ii be at least 4.
lower	Lower limit of region in which to find the zero
upper	Upper limit of region in which to find the zero
qdelta	Factor for finding intervals over which the function is close to zero

Value

Points over the given interval at which the given function is approximately equal to zero

Examples

ll_zero_finder2(function(x) (x-0.5)^2 - 0.1)
ll_zero_finder2(function(x) 8*x^3 - 11.2*x^2 + 4.56*x - 0.476)

genpwr documentation built on March 31, 2021, 1:06 a.m.