findiff {cmna} R Documentation

## Finite Differences

### Description

Finite differences formulas

### Usage

findiff(f, x, h = x * sqrt(.Machine$double.eps)) symdiff(f, x, h = x * .Machine$double.eps^(1/3))

findiff2(f, x, h)

rdiff(f, x, n = 10, h = 1e-04)


### Arguments

 f function to differentiate x the x-value to differentiate at h the step-size for evaluation n the maximum number of convergence steps in rdiff

### Details

The findiff formula uses the finite differences formula to find the derivative of f at x. The value of h is the step size of the evaluation. The function findiff2 provides the second derivative.

### Value

the value of the derivative

### Examples

findiff(sin, pi, 1e-3)
symdiff(sin, pi, 1e-3)



[Package cmna version 1.0.5 Index]