在函数调用r中出错：函数调用缺少参数

Question

创建trian数据集时，我在R中遇到上述错误。

代码：

 reg_train_df <- as.data.frame(train_df[,c("name",
                                        "price",
                                         "abtest",
                                         "vehicleType",
                                         "yearofRegistration",
                                         "gearbox",
                                         "powerPS",
                                         "model",
                                         "kilometer",
                                         "monthofRegistration",
                                         "fuelType",
                                         "brand",
                                         "notRepairedDamage",
                                          "postalCode",
                                        #"Log.price"
)])

错误：

Error in c("name", "price", "abtest", "vehicleType", "yearofRegistration", : argument 15 is empty

显示回溯：

3.
[.data.frame`(train_df, , c("name", "price", "abtest", "vehicleType", "yearofRegistration", "gearbox", "powerPS", "model", "kilometer", "monthofRegistration", "fuelType", "brand", "notRepairedDamage", "postalCode", ))

2.
train_df[, c("name", "price", "abtest", "vehicleType", "yearofRegistration", "gearbox", "powerPS", "model", "kilometer", "monthofRegistration", "fuelType", "brand", "notRepairedDamage", "postalCode", )]

1.
as.data.frame(train_df[, c("name", "price", "abtest", "vehicleType", "yearofRegistration", "gearbox", "powerPS", "model", "kilometer", "monthofRegistration", "fuelType", "brand", "notRepairedDamage", "postalCode", )])

请帮助摆脱该错误

Answer 1

这是因为您忘记删除最后一个逗号。

例如这行

reg_train_df <- as.data.frame(train_df[,c("name", "price", "abtest", "vehicleType", "yearofRegistration", "gearbox", "powerPS", "model", "kilometer", "monthofRegistration", "fuelType", "brand", "notRepairedDamage", "postalCode", #"Log.price" )])

应成为：

   reg_train_df <- as.data.frame(train_df[,c("name", "price", "abtest", "vehicleType", "yearofRegistration", "gearbox", "powerPS", "model", "kilometer", "monthofRegistration", "fuelType", "brand", "notRepairedDamage", "postalCode" #"Log.price" 
    )])