predict_trunc_normal

This internal function simulates covariate values from a normal distribution truncated
on one side.

internal

Implements the non-iterative conditional expectation (NICE)
algorithm of the g-formula algorithm (Robins (1986)
<doi:10.1016/0270-0255(86)90088-6>, Hernán and Robins (2024, ISBN:9781420076165)).
The g-formula can estimate an outcome's counterfactual mean or risk under
hypothetical treatment strategies (interventions) when there is sufficient
information on time-varying treatments and confounders.
This package can be used for discrete or continuous time-varying treatments
and for failure time outcomes or continuous/binary end of follow-up
outcomes. The package can handle a random measurement/visit process and a
priori knowledge of the data structure, as well as censoring (e.g., by loss
to follow-up) and two options for handling competing events for failure time
outcomes. Interventions can be flexibly specified, both as interventions on
a single treatment or as joint interventions on multiple treatments.
See McGrath et al. (2020) <doi:10.1016/j.patter.2020.100008> for a guide on
how to use the package.

Sean McGrath

gfoRmula

Parametric G-Formula

Victoria Lin

Zilu Zhang

Roger W. Logan

Lucia C. Petito

Jing Li

McGee Emma

Cheng Carrie

Jessica G. Young

Miguel A. Hernán

2019 The President and Fellows of Harvard College 

predict_trunc_normal function

<dl><dt>x</dt>
<dd>Integer specifying the number of observations to be simulated.</dd>
<dt>mean</dt>
<dd>Numeric scalar specifying the mean of the distribution.</dd>
<dt>est_sd</dt>
<dd>Numeric scalar specifying the standard deviation of the distribution.</dd>
<dt>a</dt>
<dd>Numeric scalar specifying the lower bound of truncation.</dd>
<dt>b</dt>
<dd>Numeric scalar specifying the upper bound of truncation.</dd></dl>

Arguments

Simulate Truncated Normal Values — predict_trunc_normal

<dl>

<dt>x</dt>
<dd>Integer specifying the number of observations to be simulated.</dd>


<dt>mean</dt>
<dd>Numeric scalar specifying the mean of the distribution.</dd>


<dt>est_sd</dt>
<dd>Numeric scalar specifying the standard deviation of the distribution.</dd>


<dt>a</dt>
<dd>Numeric scalar specifying the lower bound of truncation.</dd>


<dt>b</dt>
<dd>Numeric scalar specifying the upper bound of truncation.</dd>

</dl>

Simulate Truncated Normal Values

predict_trunc_normal: Simulate Truncated Normal Values

Description

Usage

Value

Arguments