I am looking for a function in Julia that has can take values similar to this R code:
rep(1, ncol(X))
I know I can use the package DataFrames for the length
function for the ncol()
function in R, but I can't find a rep
function in Julia.
Thank you!
The equivalent of rep
in Julia is repeat
. As arguments it takes an AbstractArray
and two keyword arguments innner
(like each
in R) and outer
(like times
in R). The benefit of repeat
is that it works consistently with multidimensional arrays (you can have a look at the documentation for details).
For example:
julia> repeat([1,2,3], inner=2, outer=3)
18-element Array{Int64,1}:
1
1
2
2
3
3
1
1
2
2
3
3
1
1
2
2
3
3
in Julia gives you the same as:
> rep(c(1,2,3), each=2, times=3)
[1] 1 1 2 2 3 3 1 1 2 2 3 3 1 1 2 2 3 3
in R.
EDIT:
If you want to repeat a scalar use fill
, e.g.:
julia> fill(1, 5)
5-element Array{Int64,1}:
1
1
1
1
1