I have an Expr
:([4.01673077 7.62137432 8.74459436 10.14775067 12.57379884 14.39781963; 17.00925227 19.2273262])
and I wish to transfer it into a Vector{Float64}, but calling eval on this directly does not seem to work.
How can I do this?
Turn an Expr into an array in julia
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1 Answers
You can either extract the data from Expr (faster and safe) or just eval it (slower, unsafe, easier code).
julia> a = :([12.57379884 14.39781963; 17.00925227 19.2273262])
:([12.57379884 14.39781963; 17.00925227 19.2273262])
julia> [Float64.(vals) for vals in getfield.(a.args, :args)]
2-element Vector{Vector{Float64}}:
[12.57379884, 14.39781963]
[17.00925227, 19.2273262]
julia> eval(a)
2×2 Matrix{Float64}:
12.5738 14.3978
17.0093 19.2273
Your matrix is wrongly formed and hence only the first solution will work with it.
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