Issue converting SymMatryx with N

[Kelvyn88]

using SymPy
@vars x1 x2

x = [1.0,0.0]
s = [-1;-1]
f = x1*x2
∇f = diff(f, [x1, x2])
∇fn = subs(∇f, (x1, 1), (x2, 0))
a = N(∇fn)
typeof(a)

I got "SymMatrix" and should be a vector of Int64

[jverzani]

Yeah, this is unexpected, but perhaps unavoidable. It comes from applying diff without broadcasting:

julia> ∇f = diff.(f, [x1, x2])
2-element Array{Sym,1}:
 x₂
 x₁

julia> ∇fn = subs.(∇f, x1=>1, x2=>0)
2-element Array{Sym,1}:
 0
 1

julia> N.(∇fn)
2-element Array{Int64,1}:
 0
 1

[Kelvyn88]

Thanks!