在r中生成序列大于1但小于n的向量

Question

How do I generate a vector of sequence in this range 1<i<n that is the number contained in the vector will be a positive integer greater than 1, but less than n. Here is what I tried bellow:

n <- 10
my_seq <- seq(from => 1, to =< n)

It gave me this error:

Error: unexpected '>' in "my_seq <- seq(from =>"

my expected output should be

[1] 2 3 4 5 6 7 8 9

Answer 1

Depending on which type of vectors you need. Below are some examples:

• If you want to have ascend sequence (without duplicates)

seq(n-2)+1
# [1]  2  3  4  5  6  7  8  9

• If you want to shuffle the values 2 to n-2 :

sample(n-2)+1
# [1]  6  7  9  5  8  4  2  3

• If you need random integers that allow duplicates

sample(n-2,replace = TRUE)+1
# [1]  5  2  8  9  4  3  6  9 

Answer 2

You could generate the sequence using

n <- 10
2:(n-1)
#[1] 2 3 4 5 6 7 8 9

OR

seq(2, n - 1)

Answer 3

You can also do:

tail(head(1:n, -1), -1)

[1] 2 3 4 5 6 7 8 9