How do I append to a vector using a `while` loop?

问题

I want to make a vector using a loop.

Here's my R code:

vec_teamCodes <- c()
x <- 0
while (x < 10) {
  append(vec_teamCodes,"Hello")
  x <- x+1
}

But when I run it, vec_teamCodes() remains NULL.

Why? How do I fix my code?

回答1:

Try this:

vec_teamCodes <- c()
x <- 0
while (x < 10) {
  vec_teamCodes <- c(vec_teamCodes,"Hello")
  # OR
  # vec_teamCodes <- append(vec_teamCodes,"Hello")
  x <- x+1
}


[1] "Hello" "Hello" "Hello" "Hello" "Hello" "Hello" "Hello" "Hello" "Hello" "Hello"

来源：https://stackoverflow.com/questions/37911963/how-do-i-append-to-a-vector-using-a-while-loop