find.finite: Try to Find a Finite Value for a function 'f'

In thomasWeise/utilizeR: An Utilities Package for R

Description

Given is a unary function f and a coordinate x1 as well as a value x2. The general goal is to find an x value for which f becomes finite and which is as close as possible to x1 from the range min(x1,x2)...max(x1,x2). If f(x1) is finite, return c(x1, f(x1). Otherwise, try to find a value t within the interval delimited by x1 and x2 for which f takes on a finite value, then return c(t, f(t). If no such value can be discovered, return c(x1, f(x1). This function will produce many warnings, see find.finite.nw for a function not producing warnings at the cost of lower speed.

Usage

find.finite(x1, x2, f)

Arguments

x1	the x coordinate at which we want to evaluate f (and also the first interval limit)
x2	the second interval limit, should be either larger or smaller than x1
f	the unary function

Value

a tuple x, f(x), which results from the attempt to find a finite function value

See Also

find.finite.nw

thomasWeise/utilizeR documentation built on May 30, 2019, 11:48 a.m.