Question

这是我的样本：

stringa = c("a","b","c")
stringb = c("high","low","average")
index = c(1,2,3)

data <- data.frame(stringa,stringb,index)

我想连接stringa和stringb，并在另一列中附加相应的索引。例如，结果的第一行应该是＆＃34;高的＆＃34;索引＆＃34; 1＆＃34;。

现在我已经使用这个函数来连接两个字符串：

c(outer(a, b, paste))

Answer 1

对于＆＃34;高＆＃34;，＆＃34; b低＆＃34;，＆＃34; c平均值＆＃34;你可以这样做：

stringa = c("a","b","c")
stringb = c("high","low","average")
index = c(1,2,3)
data.frame(concatenated = paste(stringa, stringb),index)
  concatenated
1    a high
2    b low
3    c average

对于stringa和stringb的完整排列：

stringa = c("a","b","c")
stringb = c("high","low","average")
data.frame(concatenated = c(outer(stringa, stringb, paste) ) )
    concatenated
1       a high
2       b high
3       c high
...
9    c average

如果要显式添加行索引：

df = data.frame(concatenated = c(outer(stringa, stringb, paste) ) )
df$index = rownames(df)
df 
  concatenated index
1       a high     1
2       b high     2
3       c high     3
...
9    c average     9

在r中连接两个字符串和附加索引列表

1 个答案: