getd {ROSeq} | R Documentation

## Finds the double derivative of A

### Description

Finds the double derivative of A with with respect to a, (a, b), b , (a, b) in respective templates from right to left. This first derivative is evaluated at the optimal (a_hat, b_hat). u1, v and u2 constitute the equations required for evaluating the first and second order derivatives of A with respect to parameters a and b

### Usage

    getd(u1, v, du1da, dvda)

### Arguments

`u1` | u1
`v` | v
`du1da` | First derivative of u1 with respect to parameter a
`dvda` | First derivative of v with respect to parameter a

### Value

d2logAda2

[Package ROSeq version 1.2.10 Index]