Juliaで線形プログラムを解くモデルを作成しました。私はリニアプログラムを初めて解決しましたが、修正されたプログラムでは同じコードは機能しません。何が起こっているのか理解できますか? ありがとうございました!正常に動作します コード:同じコードがJuliaで一貫して動作しない
m = Model()
@variable(m, x[1:77] >= 0)
for i in nutrients
@constraint(m, dot(data[:, i], x) >= lower[i])
end
@objective(m, Min, sum(dot(c, x)))
status = solve(m)
for i in 1:77
if getvalue(x[i]) > 0
println("Take ", getvalue(x[i]), " dollars of ", foods[i], " every day.")
end
end
println("The total cost for each day is ", getobjectivevalue(m), " dollars.")
println("The total cost for the whole year is ", getobjectivevalue(m) * 365, " dollars.")
これが結果です:
Take 0.02951906167648827 dollars of Wheat Flour (Enriched) every day.
Take 0.0018925572907052643 dollars of Liver (Beef) every day.
Take 0.011214435246144865 dollars of Cabbage every day.
Take 0.005007660466725203 dollars of Spinach every day.
Take 0.061028563526693246 dollars of Navy Beans, Dried every day.
The total cost for each day is 0.10866227820675685 dollars.
The total cost for the whole year is 39.66173154546625 dollars.
これは動作しないコードである:ここでは
m1 = Model()
for i in 1:77
if i == a
@variable(m1, x[i] == 0)
elseif i == b
@variable(m1, x[i] == 0)
else
@variable(m1, x[i] >= 0)
end
end
for i in nutrients
@constraint(m1, dot(data[:, i], x) >= lower[i])
end
@objective(m1, Min, sum(dot(c, x)))
status = solve(m1)
for i in 1:77
if getvalue(x[i]) > 0
println("Take ", getvalue(x[i]), " dollars of ", foods[i], " every day.")
end
end
println("The total cost for each day is ", getobjectivevalue(m1), " dollars.")
println("The total cost for the whole year is ", getobjectivevalue(m1) * 365, " dollars.")
はエラーメッセージです:
MethodError: no method matching dot(::NamedArrays.NamedArray{Any,1,Array{Any,1},Tuple{DataStructures.OrderedDict{Any,Int64}}}, ::JuMP.JuMPArray{JuMP.Variable,1,Tuple{Int64}})
Closest candidates are:
dot(::AbstractArray{T,1}, ::AbstractArray{T,1}) at linalg/generic.jl:302
dot{T,S,N}(::Array{T,N}, ::JuMP.JuMPArray{S,N,NT<:Tuple{Vararg{T,N}}}) at /Users/yiboliu/.julia/v0.5/JuMP/src/operators.jl:299
dot{T,S,N}(::JuMP.JuMPArray{T,N,NT<:Tuple{Vararg{T,N}}}, ::JuMP.JuMPArray{S,N,NT<:Tuple{Vararg{T,N}}}) at /Users/yiboliu/.julia/v0.5/JuMP/src/operators.jl:301
in macro expansion; at /Users/yiboliu/.julia/v0.5/JuMP/src/macros.jl:400 [inlined]
in macro expansion; at ./In[23]:13 [inlined]
in anonymous at ./<missing>:?
私は問題が制約条件にあることを知っていますが、コードのその部分は同一であり、動作しません。あなたは何が起こっているのか分かりませんか?