h_ancova: Helper function to return results of a linear model

In tern: Create Common TLGs Used in Clinical Trials

Helper function to return results of a linear model

Description

Usage

h_ancova(.var, .df_row, variables, interaction_item = NULL)

Arguments

.var	(string) single variable name that is passed by rtables when requested by a statistics function.
.df_row	(data.frame) data set that includes all the variables that are called in .var and variables.
variables	(named list of string) list of additional analysis variables, with expected elements: arm (string) group variable, for which the covariate adjusted means of multiple groups will be summarized. Specifically, the first level of arm variable is taken as the reference group. covariates (character) a vector that can contain single variable names (such as "X1"), and/or interaction terms indicated by "X1 * X2".
interaction_item	(string or NULL) name of the variable that should have interactions with arm. if the interaction is not needed, the default option is NULL.

Value

The summary of a linear model.

Examples

h_ancova(
  .var = "Sepal.Length",
  .df_row = iris,
  variables = list(arm = "Species", covariates = c("Petal.Length * Petal.Width", "Sepal.Width"))
)

tern documentation built on April 4, 2025, 12:10 a.m.