> p<-p+layer(geom = "bar",geom_params=list(fill="steelblue"),stat="bin",stat_params=list(binwidth=2))
Error in layer(geom = "bar", geom_params = list(fill = "steelblue"), stat = "bin", :
unused arguments (geom_params = list(fill = "steelblue"), stat_params = list(binwidth = 2))
怎么回事
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