R <；NA>；

我想在我的条形图中有一列缺少的数据

adult <- read.csv(
    "http://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.data", 
    header = FALSE, 
    na.strings = "?", 
    strip.white = TRUE
)
colnames(adult) <- c("age", "workClass", "fnlwgt", "education", "educationNum", "maritalStatus", "occupation", "relationship", "race", "sex", "capitalGain", "capitalLoss", "hoursPerWeek", "nativeCountry", "prediction")
barplot(table(adult$workClass), main="Job Distribution", xlab="Job", ylab="Count",las=2)

---

您可以在

表中使用参数
useNA=“ifany”

tab <- table(adult$workClass, useNA = "ifany")
#  Federal-gov        Local-gov     Never-worked          Private 
#          960             2093                7            22696 
# Self-emp-inc Self-emp-not-inc        State-gov      Without-pay 
#         1116             2541             1298               14 
#         <NA> 
#         1836 

现在，绘图在x轴上也显示名称
“NA”

barplot(tab, main = "Job Distribution", xlab = "Job", ylab = "Count", las = 2)

您可以在
表中使用参数
useNA=“ifany”

tab <- table(adult$workClass, useNA = "ifany")
#  Federal-gov        Local-gov     Never-worked          Private 
#          960             2093                7            22696 
# Self-emp-inc Self-emp-not-inc        State-gov      Without-pay 
#         1116             2541             1298               14 
#         <NA> 
#         1836 

现在，绘图在x轴上也显示名称
“NA”

barplot(tab, main = "Job Distribution", xlab = "Job", ylab = "Count", las = 2)

如何使条形图具有NA的列名？默认情况下它似乎是空的。如何使条形图具有NA的列名？它似乎默认为空白。