時遇到命名標題，直方圖X和Y軸，收到錯誤消息

Question

我無法把標籤貼在我的數據的這個子集的直方圖：

hist(Familiar$letterCount, main = "Letter count of Familiar Words", xlab = "Letter Count", ylab = "Frequency", abline(v = mean(Familiar$letterCount), col = "black")) 

，我得到的錯誤信息：

invalid breakpoints produced by 'breaks(x)' null r 

我很抱歉，如果這沒有正確格式化堆棧溢出，但我在這裏犯了什麼錯誤？

Answer 1

你在'hist'函數中包含'abline'函數。請嘗試以下操作：

hist(Familiar$letterCount, main = "Letter count of Familiar Words", 
    xlab = "Letter Count", ylab = "Frequency") 

abline(v = mean(Familiar$letterCount), col = "black")