Question

lingo怎么使一个矩阵的某几行或者某几列相加等于某个数

sets:
point/1..14/;
column/1..12/;
link(point,column):f;
endsets
要让f的第六到第八行相加等于6怎么输呢。谢谢啦

Answer 1

@sum(link(i,j)|j#ge#6 #and# j#le#8: f(i,j))=6;