ADapply: AD apply functions

In RTMB: 'R' Bindings for 'TMB'

AD apply functions

Description

These base apply methods have been modified to keep the AD class attribute (which would otherwise be lost).

Usage

## S4 method for signature 'advector'
apply(X, MARGIN, FUN, ..., simplify = TRUE)

## S4 method for signature 'ANY'
sapply(X, FUN, ..., simplify = TRUE, USE.NAMES = TRUE)

## S4 method for signature 'ANY'
Vectorize(FUN, vectorize.args = arg.names, SIMPLIFY = TRUE, USE.NAMES = TRUE)

Arguments

X, MARGIN, FUN, ...	See apply
simplify, USE.NAMES	See sapply
vectorize.args, SIMPLIFY	See Vectorize. USE.NAMES is currently ignored by AD version.

Details

The Vectorize function is especially fast in RTMB, and recommended to be used to speed up long computations where tape construction is a bottleneck.

Value

Object of class "advector" with a dimension attribute.

Functions

• apply(advector): As apply

• sapply(ANY): As sapply

• Vectorize(ANY): As Vectorize

Examples

F <- MakeTape(function(x) apply(matrix(x,2,2), 2, sum), numeric(4))
F$jacobian(1:4)
f <- Vectorize(function(x) integrate(dnorm, -Inf, x)$value)
F <- MakeTape(f, numeric(1e3))

RTMB documentation built on March 20, 2026, 5:08 p.m.