[R] Vector manipulation

[syrvn]

Hello,


I am stuck with the following problem. Consider the vector:

vec <- c(2,4,6,9,10)

I now want to use R to manipulate the vector as follows:

[1] 2, 4, 2, 6, 2, 9, 2, 10

In words, the first element of the vector should be placed in front of each
following number.

Which R commands do I need to achieve that?


Cheers

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