我想重新排列一个数据帧，以便1)第一列始终保持在第一位，2)其余列的后半部分被拆分为每隔一秒出现一次.
请注意，在下面的示例中
请参考示例数据:
# Example data
N <- "AB"
l_x_1 <- 1
l_x_2 <- 2
l_x_3 <- 3
# ... not it should be able to handle different number of columns
s_x_1 <- 1
s_x_2 <- 2
s_x_3 <- 3
# ... not it should be able to handle different number of columns (although always equal N of s_ and l_.
# Current state
df <- tibble(N, l_x_1, l_x_2, l_x_3, s_x_1, s_x_2, s_x_3)
df
# What I want (but potential to handle different number of As and Bs)
df <- tibble(N, l_x_1, s_x_1, l_x_2, s_x_2, l_x_3, s_x_3)
df