[julia-users] Creating an empty 2D array and append values to it

[Fred]

Hi !

The questions I have is so trivial that I spend a long time trying to find 
an example on the doc and on the web but I did not manage to do exactly 
what I want :

I want to create an empty 2D array  :  the function readdlm create exactly 
the kind of array I want if I read a CSV file with 2 columns. For example :

julia> m
1913x2 Array{Float64,2}:
  201.07     6597.95     
  202.092   17835.7      
  202.944    9667.59     
  204.015   11983.4      
  204.811    7586.52     
  205.803       1.1506
....




I tried to create exactly the same type of array and append values to it :

julia> a = Array{Float64,2}
Array{Float64,2}


push!(a, 10.0,3.0)
ERROR: MethodError: `push!` has no method matching push!(::Type{Array{
Float64,2}}, ::Float64)
Closest candidates are:
  push!(::Any, ::Any, ::Any)
  push!(::Any, ::Any, ::Any, ::Any...)
  push!(::Array{Any,1}, ::ANY)


 push!(a, [10.0,3.0])
ERROR: MethodError: `push!` has no method matching push!(::Type{Array{
Float64,2}}, ::Array{Float64,1})
Closest candidates are:
  push!(::Any, ::Any, ::Any)
  push!(::Any, ::Any, ::Any, ::Any...)
  push!(::Array{Any,1}, ::ANY)


append!(a, [10.0,3.0])
ERROR: MethodError: `append!` has no method matching append!(::Type{Array{
Float64,2}}, ::Array{Float64,1})
Closest candidates are:
  append!{T}(::Array{T,1}, ::AbstractArray{T,1})
  append!{T}(::StatsBase.AbstractHistogram{T,1,E}, ::AbstractArray{T,1})
  append!{T}(::StatsBase.AbstractHistogram{T,1,E}, ::AbstractArray{T,1}, ::
StatsBase.WeightVec{W,Vec<:AbstractArray{T<:Real,1}})
  ...



etc... I tried every possible syntax to append values to an empty 2D array 
and I did not find the solution and the correct syntax :)

Thank you for your help !