cancer 查阅文献时看到此图,但不知该怎么做(只会用R做折线图),请教各位怎么能将折线图用线连接起来呢?谢谢https://mmbiz.qpic.cn/mmbiz_png/BEHGuOFb2r1HGo0Wo8DzDDGwe9HRK6ia7UFYYcCITmib6SAzialPQsPN9JqzXQQMRqKjuqhB5t2mxHVbJMtFQBOcQ/640?wx_fmt=png&tp=webp&wxfrom=5&wx_lazy=1