I don’t think the code you posted actually contains the line that is causing your error. It appears your error comes from a confusion of the functions zero and zeros (I noted something similar when I commented on your related issue last night here)
Consider:
help?> zero
search: zero zeros iszero set_zero_subnormals get_zero_subnormals count_zeros
zero(x)
Get the additive identity element for the type of x (x can also specify the
type itself).
Examples
≡≡≡≡≡≡≡≡≡≡
julia> zero(1)
0
julia> zero(big"2.0")
0.0
julia> zero(rand(2,2))
2×2 Array{Float64,2}:
0.0 0.0
0.0 0.0
Which is different from:
help?> zeros
search: zeros count_zeros set_zero_subnormals get_zero_subnormals leading_zeros
zeros([T=Float64,] dims...)
Create an Array, with element type T, of all zeros with size specified by
dims. See also fill, ones.
Examples
≡≡≡≡≡≡≡≡≡≡
julia> zeros(1)
1-element Array{Float64,1}:
0.0
julia> zeros(Int8, 2, 3)
2×3 Array{Int8,2}:
0 0 0
0 0 0
Your use case seems largely to be the creation of arrays filled with zeros, for which zeros is the appropriate function. Your error likely comes from calling:
julia> zero(Array{Float64,1})
ERROR: MethodError: no method matching zero(::Type{Array{Float64,1}})
i.e. calling the zero function with a Type, rather than in instance/object of a type.
More generally I think others have already pointed out that many of your issues and questions fundamentally boil down to relatively basic misunderstandings of usage and behaviour of variables, functions, values, types etc. in Julia. I think it might be helpful for you to work through an introductory resource that clarifies some of these questions and hopefully helps you to avoid issues you seem to keep running into; I always found Ben Lauwen’s Think Julia an excellent resource for this tasks and I’d recommend you take a couple of days to work through it step-by-step!