Question

我试图在Julia中为JuMP模型添加约束，如下所示：

@constraint(m, sum{z[i,j]>=2, i in N, j in K})

其中N和K是两组。

但是，当我调试它时，我收到以下错误消息。

LoadError: In @constraint(m,sum{z[i,j] >= 2,i in N,j in K}): Constraints must be in one of the following forms:
   expr1 <= expr2
   expr1 >= expr2
   expr1 == expr2
   lb <= expr <= ub
while loading /Users/user/Dropbox/Model/ip.jl, in expression starting on line 51
 in include_string(::String, ::String) at loading.jl:441
 in include_string(::String, ::String) at sys.dylib:?
 in include_string(::Module, ::String, ::String) at eval.jl:34
 in (::Atom.##59#62{String,String})() at eval.jl:73
 in withpath(::Atom.##59#62{String,String}, ::String) at utils.jl:30
 in withpath(::Function, ::String) at eval.jl:38
 in macro expansion at eval.jl:71 [inlined]
 in (::Atom.##58#61{Dict{String,Any}})() at task.jl:60

有人可以帮我解决这个错误吗？

Answer 1

我相信你的意思是： @constraint(m, sum{z[i,j], i in N, j in K}>=2)

不平等应该在总和之外。因为您希望所有值的总和至少为2。

在JuMP中添加约束

1 个答案: