update_sample_ratio

update sample ratios of arms. This could be called after an arm is added or
removed. Sample ratios can be updated for any existing arms.
This is a user-friendly wrapper of the member function of trial, i.e.,
<code>Trials$update_sample_ratio()</code>, which is used in vignettes.
Users who are not familiar with the concept of classes may consider using
this wrapper directly.

Simulate phase II and/or phase III clinical trials. It supports various types of endpoints and adaptive strategies. Tools for carrying out graphical testing procedure and combination test under group sequential design are also provided.

Han Zhang

TrialSimulator

Clinical Trial Simulator

update_sample_ratio function

<dl><dt>trial</dt>
<dd>a trial object returned by <code>trial()</code>.</dd>
<dt>arm_names</dt>
<dd>character vector. Name of arms.</dd>
<dt>sample_ratios</dt>
<dd>numeric vector. New sample ratios of arms. If sample
ratio is a whole number, the permuted block randomization is adopted;
otherwise, <code><a href="/link/sample()?package=TrialSimulator&version=1.10.1" data-mini-rdoc="TrialSimulator::sample()">sample()</a></code> will be used instead, which can cause imbalance
between arms by chance. However, this is usually fine for simulation.</dd></dl>

Arguments

Updating Sampling Ratios of Existing Arms in a Trial — update_sample_ratio

<dl>

<dt>trial</dt>
<dd>a trial object returned by <code>trial()</code>.</dd>


<dt>arm_names</dt>
<dd>character vector. Name of arms.</dd>


<dt>sample_ratios</dt>
<dd>numeric vector. New sample ratios of arms. If sample
ratio is a whole number, the permuted block randomization is adopted;
otherwise, <code><a href='https://rdrr.io/r/base/sample.html'>sample()</a></code> will be used instead, which can cause imbalance
between arms by chance. However, this is usually fine for simulation.</dd>

</dl>

update_sample_ratio: Updating Sampling Ratios of Existing Arms in a Trial

Description

Usage

Arguments