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#' descriptive_equiv function
#'
#' This function takes two datasets \eqn{X_A, X_B}, regression formula,
#' significance level \eqn{\alpha} and sensitivity level
#' \eqn{\delta_\beta} (either vector or scalar). It builds a logistic
#' regression model for each of the datasets and then checks whether the
#' obtained coefficient vectors are equivalent, using the
#' \code{beta_equivalence} function.
#' @param data_a dataset \eqn{X_A} for model \eqn{M_A}
#' @param data_b dataset \eqn{X_B} for model \eqn{M_B}
#' @param formula logistic regression formula
#' @param delta equivalence sensitivity level \eqn{\delta_\beta}
#' @param alpha significance level \eqn{\alpha} (defaults to 0.05)
#' @return \describe{
#' \item{\code{equivalence}}{ the \code{beta_equivalence} function output}
#' \item{\code{model_a}}{ logistic regression model \eqn{M_A}}
#' \item{\code{model_b}}{ logistic regression model \eqn{M_B}}
#' }
#' @export
#' @importFrom stats glm binomial as.formula
descriptive_equiv <- function(data_a, data_b, formula, delta,
alpha = 0.05) {
model_a <- glm(formula = as.formula(formula),
family = binomial(link = "logit"),
data = data_a
)
model_b <- glm(formula = as.formula(formula),
family = binomial(link = "logit"),
data = data_b
)
return(list(
equivalence = beta_equivalence(model_a, model_b, delta, alpha),
model_a = model_a,
model_b = model_b
))
}
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