fenguoerbian 等高线可以geom_contour来实现。如果双纵座标的话,两个坐标之间有明确的变换关系,那么可以在scale_y_continuous中设置sec.axis参数。如果两个纵座标完全独立,那么ggplot2不能直接实现,理由可以参考hadley自己给的回答
arthurXXX fenguoerbian %>% select(SPEED,TORQUE,FUELCOSP) %>% mutate(SPEED=round(SPEED,-2),TORQUE=round(TORQUE,-1)) %>% filter(FUELCOSP <= 300 ) %>% ggplot(aes(x = SPEED, y = TORQUE )) + geom_contour(aes(z = FUELCOSP)) + xlim(1000,6000)+ ylim(0,300)+ theme_bw() 输出不了理想结果啊 示例数据见: 链接: https://pan.baidu.com/s/1Rv94oFQj97nYwZbg7BeHBg?pwd=5xcb 提取码: 5xcb