Generate ggplot2 color and fill scales dynamically — generate_color

This function intelligently applies manual or automatically generated color/fill scales based on the number of unique levels in the specified variable and the available custom colors. If the variable is continuous, it defaults to a viridis scale.

Usage

generate_color_scale(data, var_name, current_colors, type = c("color", "fill"))

Arguments

data: A data frame containing the variable.
var_name: A string specifying the column name for color or fill mapping.
current_colors: A vector of preferred colors from the style settings.
type: The type of scale to generate: "color" or "fill".

Value

A ggplot2 scale object (e.g., `scale_color_manual`, `scale_fill_manual`) or NULL if no variable to map.