URL：https://images.techhive.com/images/article/2017/01/r_programming_language_abstract_programming_background_thinkstock_3x2_1200x800-100703503-large.jpg?auto=webp&quality=85,70
掲載元：https://www.computerworld.com/article/2497319/business-intelligence-beginner-s-guide-to-r-syntax-quirks-you-ll-want-to-know.html
