lingo语句求解析sets: demand/1..6/:a,b,d; supply/1..2/:x,y,e; link

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lingo语句求解析
sets:
demand/1..6/:a,b,d;
supply/1..2/:x,y,e;
link(demand,supply):c;
endsets
data:
a=1.25,8.75,0.5,5.75,3,7.25;
b=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11;
e=20,20;
enddata
init:
x,y=5,1,2,7;
endinit
[obj]min=@sum(link(i,j):c(i,j)*(((x(j)-a(i)))^2+(y(j)-b(i))^2)^(1/2));
@for(demand(i):@sum(supply(j):c(i,j))=d(i));
@for(supply(j):@sum(demand(i):c(i,j))

你最好找个教程看看 @for的基本格式就是
@for(集名(下标): 约束条件); 具体哪个是哪个你自己对应一下我想应该能知道吧基本格式的问题而已
再问：对于C(I,J)和C（j,i）有什么区别一直不清楚
再答：下标顺序跟你派生集定义的时候的顺序有关不要搞错了具体一点 c(1,2)跟c(2,1)能一样吗如果你不确定就把最外面的@for的下标给定了再看能清楚一点
再问：老师能加个QQ不。。。求助有关lingo的一些问题
再答：点我id看资料

lingo语句求解析sets: demand/1..6/:a,b,d; supply/1..2/:x,y,e; link lingo错误29sets:sec/1..15/:a,b,c,d,e,f,g,w;endsetsdata:a,b,c,d lingo 整数规划model:sets:P/1,2/;Q/1..6/:a,b,d;R(P,Q):c,z;endsets LINGO求解错误MODEL:SETS:CITY/1..5/:U;LINK(CITY,CITY):COST,X;ENDS lingo程序：model：sets：product/1..3/:a,b; row/1..5/:c,d,y; num/1 lingo查错model:sets:kinds/1..10/:v,Q,s,N,c_p,d,p;fa/1..3/;link lingo错误modelsets:xiaodi/1..4/:b;chandi/1..3/:a;link(chandi,x lingo 程序sets:k/1..5/;z/1..8/:m;link(k,z):a,c,l,t,s;endsetsmi 关于LINGO程序lingo程序如下：sets：a/1..5/:x; endsets data:x=1,2,3,4,5; LINGO sets:product /1..7/:capcity,value;need /1..14/:demand; lingo sets中可以由已知数和未知数组成吗?例如 sets zuobio/1..22/:x,y; endset lingo题求助!model:sets:plants / a,b,c,d /:;closed(plants) / b /