transform1: Exponential parameter transformation

In ameras: Analyze Multiple Exposure Realizations in Association Studies

Exponential parameter transformation

Description

Applies exponential transformation f(\theta_i)=\exp(\theta_i)+L_i to one or multiple components of parameter vector \bm \theta, where L_i are lower limits that can be different for each component

Usage

transform1(params, index.t=1:length(params), lowlimit=rep(0,length(index.t)), 
  boundcheck=FALSE, boundtol=1e-3, ... )

Arguments

params	full input parameter vector
index.t	indices of parameters to be transformed (default all)
lowlimit	lower limits to be applied (default zero), where the k-th component of lowlimit is applied to the k-th index in index.t
boundcheck	whether to produce a warning when any of the transformed parameters are within boundtol of lowlimit
boundtol	tolerance for producing a warning for reaching the boundary
...	not used

Value

Transformed parameter vector.

Examples

params <- c(.1, .5, 1)
transform1(params, lowlimit=c(0, -1, 1))

ameras documentation built on March 29, 2026, 5:07 p.m.