# f: function returning one function value, or a vector of... In FindAllRoots: Find all root(s) of the equation and Find root(s) of the equation by dichotomy

## Description

function returning one function value, or a vector of function values.

## Usage

 `1` ```f(x, a, b) ```

## Arguments

 `x` either one value or a vector containing the x-value(s) `a` vector of coefficients of the equation `b` vector of exponention of the equation,One one corresponding with a mentioned above

## Details

the function f that estimates the function values will be called as f(x, ...). If x is a vector, then the first argument passed to f should also be a vector.

## Value

the value(s) of the function equation,one function value, or a vector of function values.

Bingpei Wu

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15``` ```##---- Should be DIRECTLY executable !! ---- ##-- ==> Define data, use random, ##-- or do help(data=index) for the standard data sets. a=c(2,-1,-13,-1,-5) b=c(4:0) x=c(1:3) f(x,a,b) ## The function is currently defined as function (x, a, b) { z = 0 for (i in 1:length(b)) z = z + a[i] * x^(b[i]) z } ```

FindAllRoots documentation built on May 2, 2019, 6:34 a.m.