Creating vector from two vectors in Julia

3
votes

I have two vectors, say, x=[1;1] and y=[2;2]

I want to construct a vector whose element is a combination of these two, i.e. z=[[1,2],[1,2]]

What is the most efficient way to do that?

1
julia

1 Answers

5
votes

Just use zip. By default, this will create a vector of tuples:

julia> z = collect(zip(x,y))
2-element Array{Tuple{Int64,Int64},1}:
 (1,2)
 (1,2)

Note that this is different than what you wanted, but it'll be much more efficient. If you really want an array of arrays, you can use a comprehension:

julia> [[a,b] for (a,b) in zip(x,y)]
2-element Array{Array{Int64,1},1}:
 [1,2]
 [1,2]