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 |

`h` |
the step-size for evaluation |

`n` |
the maximum number of convergence steps in |

### 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]