Question

我正在尝试通过在R中添加两个现有的数字变量来生成新变量。我知道我可以使用以下代码，并且可以正常工作。

这是一个数据样本：

B01001_SEX_BY_AGE <- structure(list(GEOID = "04000US17", `Geography Name` = "Illinois", 
               `Total Population` = 12851684, Male = 6310460, `Male: Under 5 years` = 403373, `Female: Under 5 years` = 406002), row.names = c(NA, 
                                                                                                                                              -1L), class = c("tbl_df", "tbl", "data.frame"))


B01001_SEX_BY_AGE$"Under 5 years"= B01001_SEX_BY_AGE$"Male: Under 5 years" + B01001_SEX_BY_AGE$"Female: Under 5 years"

但是正如您所看到的，我为数据框和变量起了很长的名字。因此，必须在这些表达式中同时引用数据帧和变量名称，会变得很混乱。我尝试了以下替代方法，但是它们都遇到了相同的错误。 Evaluation ERROR: non-numeric argument to binary operator。我还尝试为这些变量添加as.numeric()并用下划线替换变量名称中的空格，但仍然无法正常工作。

#Method 1

attach(B01001_SEX_BY_AGE)
B01001_SEX_BY_AGE$"Under 5 years"= "Male: Under 5 years" + "Female: Under 5 years"
detach(B01001_SEX_BY_AGE)



#Method 2

B01001_SEX_BY_AGE <- transform(B01001_SEX_BY_AGE,
                 "Under 5 years" = "Male: Under 5 years" + "Female: Under 5 years"
)

#Method 3

library(dplyr)
B01001_SEX_BY_AGE <- mutate(B01001_SEX_BY_AGE,"Under 5 years" = "Male: Under 5 years" + "Female: Under 5 years")

全部在控制台中返回以下错误：

Error in "Male Under 5 years" + "Female_Under_5_years" : 
      non-numeric argument to binary operator

非常感谢您的帮助。谢谢。

Answer 1

对于带空格的名称，请尝试使用反引号代替双引号

library(dplyr)
B01001_SEX_BY_AGE <- mutate(B01001_SEX_BY_AGE,`Under 5 years` = `Male: Under 5 years` + `Female: Under 5 years`)

R：错误：二进制运算符的非数字参数

1 个答案: