Detect Treatment Groups for Color Assignment — assign_treatment

Automatically detects placebo and treatment groups from treatment variable and assigns appropriate colors following clinical conventions.

Usage

assign_treatment_colors(treatment_var, palette_type = "treatment")

Named character vector of colors with treatment names as names.

This function uses pattern matching to identify placebo groups and assigns neutral grey color, while active treatments get distinct colors.

Placebo detection patterns include: "placebo", "control", "sham", case-insensitive matching.

treatments <- c("Placebo", "Drug A 10mg", "Drug A 20mg")
colors <- assign_treatment_colors(treatments)