运行这段代码qplot(carat,price,data=dsmall,geom = c("point","smooth"),span=0.2) 报错Error: Unknown parameters: span 运行这段代码qplot(carat, price, data = dsmall, geom = c("point", "smooth"),method = "loess",span=0.2) 报错Error: Unknown parameters: method, span
