2 回答qplot(Wind,Temp , data = airquality, geom = c("point","smooth")) 出現問題，錯誤代碼如下

2 回答Error in hist.default(airquality$wind) : 'x'必需為數值

2 回答R-ggplot2-qplot繪圖函數問題

1 回答使用qplot,Error: `mapping` must be created by `aes()`

2 回答with(airquality,plot(wind,Temp)運行提示找不到with()是怎么了呢