pdgradNumeric {lme4} | R Documentation

## Evaluate the pdmatrix gradient numerically

### Description

Evaluate the pdmatrix gradient via finite differences. This function is used to validate the `pdgradient` methods for `pdMat` classes.

### Usage

    pdgradNumeric(x)

### Arguments

`x` | A `pdMat` object

### Value

A finite-difference approximation to the gradient of the `pdmatrix` represented by `x` with respect to the parameters of `x`.

### Author(s)

Douglas Bates bates@stat.wisc.edu and Saikat DebRoy saikat@stat.wisc.edu

### Examples

[Package Contents]