[R] insert number in vector

J.R. Lockwood lockwood at rand.org
Tue Jun 18 15:32:43 CEST 2002

> I need to create a vector inserting an 1 after each value of another vector.
> For example:
> vec1<-c(2,3,4)
> I need to create a vector with the values 2,1,3,1,4
> Does anyone know how create this vector without loops (vec1 could have 1000
> elements)

This problem came up for me in the past and I started w/ all sorts of
rep() contortions, but then I thought of a cleverish way:



you'll have to chop the trailing "1".

J.R. Lockwood
412-683-2300 x4941
lockwood at rand.org

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