Summary of Changes

Added functionality to extract and clean vehicle make and model data.

New Functions

extract_make_stats19(generic_make_model)

Extracts the make from a generic make/model string, handling multi-word makes (e.g., “LAND ROVER”, “ALFA ROMEO”).

clean_make(make, extract_make = TRUE)

Cleans vehicle make names. - By default (extract_make = TRUE), it first calls extract_make_stats19() on the input. - Standardizes common abbreviations (e.g., “VW” -> “Volkswagen”). - Corrects misspellings and synonyms. - Handles case sensitivity (keeps “GM”, “BMW” etc. uppercase, others Title Case).

Examples:

Input	Output
“FORD FIESTA”	“Ford”
“LAND ROVER DISCOVERY”	“Land Rover”
“VW GOLF”	“Volkswagen”
“unknown”	“Unknown”

clean_model(model)

Standardizes vehicle model names to title case.

Examples:

Input	Output
“FIESTA”	“Fiesta”

Testing

Tests in tests/testthat/test-clean.R cover: - Basic cleaning (VW -> Volkswagen). - Multi-word extraction (LAND ROVER DISCOVERY -> LAND ROVER). - Integrated extraction and cleaning. - Case preservation for acronyms.