如何将r中的两个字符向量组合成一个新的向量？

Question

I have two vectors as shown below.

a<-c("a","b","c","d")
b<-"constant"

Now I need to combine above two vectors and the final output should be in the form as I showed below.

list(a="constant",b="constant",c="constant",d="constant")

Thanks in advance.

Answer 1

You can try the following:

l <- as.list(rep(b, length(a)))
names(l) <- a

Answer 2

We can repeat b , length(a) times gives them names with setNames and convert it into list.

as.list(setNames(rep(b, length(a)), a))

#$a
#[1] "constant"

#$b
#[1] "constant"

#$c
#[1] "constant"

#$d
#[1] "constant"

Answer 3

Here is an other way that might be simpler:

l <- list()
l[a] <- b