我有两个几乎相同的data.frames，我想找到添加到> colnames(x.1)
[1] "listPrice" "rent" "floor" "livingArea"
[5] "rooms" "published" "constructionYear" "objectType"
[9] "booliId" "soldDate" "soldPrice" "url"
[13] "additionalArea" "isNewConstruction" "location.namedAreas" "location.address.streetAddress"
[17] "location.address.city" "location.position.latitude" "location.position.longitude" "location.region.municipalityName"
[21] "location.region.countyName" "location.distance.ocean" "source.name" "source.id"
[25] "source.type" "source.url" "areaSize" "priceDiff"
[29] "perc.priceDiff" "sqrmPrice"
> colnames(x.2)
[1] "listPrice" "livingArea" "additionalArea" "plotArea"
[5] "rooms" "published" "constructionYear" "objectType"
[9] "booliId" "soldDate" "soldPrice" "url"
[13] "isNewConstruction" "floor" "rent" "location.namedAreas"
[17] "location.address.streetAddress" "location.address.city" "location.position.latitude" "location.position.longitude"
[21] "location.region.municipalityName" "location.region.countyName" "location.distance.ocean" "source.name"
[25] "source.id" "source.type" "source.url" "areaSize"
[29] "priceDiff" "perc.priceDiff" "sqrmPrice"
对象的唯一列名。
{{1}}
答案 0 :(得分：3)
您可以使用public static void main(String[] args) {
/* Enter your code here. Read input from STDIN. Print outputto STDOUT. Your class should be named Solution. */
Scanner in = new Scanner(System.in);
int n= in.nextInt();
int q = in.nextInt();
in.nextLine();
int[] a = new int[n+1];
for(int i=1;i<=n;i++)
{
a[i]= in.nextInt();
}
for(int j=0;j<q;j++)
{
int l = in.nextInt();
int r = in.nextInt();
int sum=0;
for(int k=l;k<=r ;k++)
{
sum = Math.abs(sum+a[k]);
}
if(sum%2 == 0)
System.out.println("Even");
else
System.out.println("Odd");
}
}
获取“x.2”中的列名，而不是“x.1”中的列名
setdiff答案 1 :(得分：2)
尝试
colnames(x.2)[!colnames(x.2) %in% colnames(x.1)]