I would do it like this but I'm curious to see whether it can be easier solved
:-)
b <- c(1:10)
vector_list <- lapply(1:length(b), FUN = function(x) { b[1:x] }))
(for everything in a large vector just apply "unlist" to the "vector_list")
Antje
Chaofeng Kou schrieb:
Dear all,
I have got a question for generating repeats of a vector's elements.
Please don't hesitate to email me back and say that it is very easy
although I can't find a method to solve it.
If I have a n-vector b, whose elements are b[1], b[2], ..., b[n], how
can I generate such a vector
b[1], b[1], b[2], b[1], b[2], b[3], b[1], b[2], b[3], b[4],
......, b[1], b[2], ..., b[n]
which contains n(n+1)/2 elements.
Thanks very much.
Regards
Chaofeng Kou
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
