Here’s a supported way to do this operation.
— John
julia> using DataArrays
julia> a=@data([NA,3,5,7,NA,3,7])
7-element DataArray{Int64,1}:
NA
3
5
7
NA
3
7
julia> b = copy(a)
7-element DataArray{Int64,1}:
NA
3
5
7
NA
3
7
julia> pop!(b)
7
julia> unshift!(b, NA)
NA
julia> b
7-element DataArray{Int64,1}:
NA
NA
3
5
7
NA
3
On Sep 23, 2014, at 6:11 PM, Li Zhang <[email protected]> wrote:
>
>
> a=@data([NA,3,5,7,NA,3,7])
> i want to do this:
> b=[NA,a[1:end-1]]
>
> but julia says no convert methods.
>
> is there anyone know some other ways?
