水平軸的正確名稱

Question

目標：
我想在boxplot的橫軸上設置月份名稱「January」和「February」。

問題：
我試圖做到這一點，但我失敗了。將「月」和「名稱」作爲橫軸上的文本是不正確的。

mydata 

#  Month Count 
# 1 January 10 
# 2 January 11 
# 3 January 22 
# 4 January 55 
# 5 January  4 
# 6 January 88 
# 7 February 44 
# 8 February 40 
# 9 February 30 
# 10 February 28 

這裏是dputmydata的：

mydata<-structure(list(Month = structure(c(2L, 2L, 2L, 2L, 2L, 2L, 1L, 
1L, 1L, 1L), .Label = c("February", "January"), class = "factor"), 
    Count = c(10, 11, 22, 55, 4, 88, 44, 40, 30, 28)), .Names = c("Month", 
"Count"), row.names = c(NA, -10L), class = "data.frame") 

這裏是boxplot(mydata)結果：

Answer 1

你可以這樣做：

boxplot(df$Count~df$Month) 

則回覆：

如果你想顯示一月然後二月，這樣做：

df[,1]<-factor(df[,1],levels=c('January','February')) 
boxplot(df$Count~df$Month) 

或者只是：

boxplot(df$Count~df$Month,names=c('January','February'))