Note that in `a = Array{Float64,2}`, `a` is a *type*, not an *instance*. You
presumably mean `a = Array(Float64, 0, 0)`.
But Yichao is right that you can't grow a 2d array, only a 1d one.
Best,
--Tim
On Tuesday, April 12, 2016 09:44:16 AM Yichao Yu wrote:
> On Tue, Apr 12, 2016 at 9:38 AM, Fred <[email protected]> wrote:
> > 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 :)
>
> It's not possible without creating a new one.
>
> You can create a 1d one and resize it.
>
> > Thank you for your help !
