ปรับแต่งพายชาร์ตให้เรียบร้อย

ggplot(disease_counts, aes(x = 1, y = total_cases, fill = disease)) +
	# Use a column geometry.
	geom_col() +
	# Change coordinate system to polar.
	coord_polar(theta = "y") +
	# Clean up the background with theme_void and give it a proper title with ggtitle.
	___ +
	___