Also, if you don't need a .csv file, consider using the HDF5 and JLD
packages which preserve the types of stored values:
julia> a = [1.,2.,3.,4]
4-element Array{Float64,1}:
1.0
2.0
3.0
4..0
julia> b = Vector{Float64}[copy(a),2*copy(a),3*copy(a)]
3-element Array{Array{Float64,1},1}:
[1.0,2.0,3.0,4.0]
[2.0,4.0,6.0,8.0]
[3.0,6.0,9.0,12.0]
julia> using HDF5, JLD
julia> save("myfile.jld","b",b)
julia> c = load("myfile.jld","b")
3-element Array{Array{Float64,1},1}:
[1.0,2.0,3.0,4.0]
[2.0,4.0,6.0,8.0]
[3.0,6.0,9.0,12.0]
