Question

我知道这听起来像是一个重复的问题，但我搜索了很多，无法找到这个问题的答案。这是我的情况。

我在R中有2个data.frames。

PotentialTravellersHistory
PossibleAirports

这两个数据帧的列名是

> dput(names(PotentialTravellersHistory))
c("uid", "utc", "lat", "long", "vid")

> dput(names(PossibleAirports))
c("DestinationAirportId", "Airline", "AirlineId", "SourceAirport", 
"SourceAirportId", "DestinationAirport", "Name", "City", "Country", 
"IataFaa", "Icao", "Latitude", "Longitude", "MaxLatitude", "MinLatitude", 
"MaxLongitude", "MinLongitude")

我的问题是我需要创建一个新的数据框＆＃34; AirportTravellers＆＃34;其具有如上定义的所有列名，即这些列名是第一和第二数据帧的列名的组合。我怎么做？＆＃34; AirportTravellers＆＃34;的列名示例如下：

"uid", "utc", "lat", "long", "vid", "DestinationAirportId", "Airline",
"AirlineId", "SourceAirport", "SourceAirportId", "DestinationAirport", 
"Name", "City", "Country", "IataFaa", "Icao", "Latitude", "Longitude", 
"MaxLatitude", "MinLatitude", "MaxLongitude", "MinLongitude"

Answer 1

最简单的方法是

AirportTravellers <- cbind(PotentialTravellersHistory[0,], PossibleAirports[0,])

Answer 2

当只有名称可用且没有现有数据框时：

varnames <- c("uid", "utc", "lat", "long", "vid","DestinationAirportId", 
              "Airline","AirlineId", "SourceAirport", "SourceAirportId",
              "DestinationAirport","Name", "City", "Country", "IataFaa",     
              "Icao", "Latitude", "Longitude","MaxLatitude", "MinLatitude", 
              "MaxLongitude", "MinLongitude")

创建一个空数据框：

AirportTravellers <- data.frame()

命名变量：

for( i in 1:length(varnames)){
     AirportTravellers[0,eval(varnames[i])]
 }

现在将创建一个具有给定变量名称的空数据框。

将列名称从R中2个不同数据帧的列名称分配给新的空数据帧

2 个答案: