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Updating Sampling Ratios of Existing Arms in a Trial

Source: R/update_sample_ratio.R
update_sample_ratio.Rd

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., Trials$update_sample_ratio(), which is used in vignettes. Users who are not familiar with the concept of classes may consider using this wrapper directly.

Usage

update_sample_ratio(trial, arm_names, sample_ratios)

Arguments

trial

a trial object returned by trial().

arm_names

character vector. Name of arms.

sample_ratios

numeric vector. New sample ratios of arms. If sample ratio is a whole number, the permuted block randomization is adopted; otherwise, sample() will be used instead, which can cause imbalance between arms by chance. However, this is usually fine for simulation.