I want to get some arbitrary element in a set and put it into a parameter. How would I complete the below?
set := A, B, C; param some_element_in_set, symbolic := ?????; The closest I saw was in this old help-glpk email: https://lists.gnu.org/archive/html/help-glpk/2006-11/msg00059.html Which says: set S; param ref{i in 1..card(S)}, symbolic, in S; # ref[i] refers to i-th element of S; param a{S}; ... a[ref[i]] ... # means a[i-th element of S] But I cannot get this to work. If I could get it to work, then I would do something like: param some_element_in_set := ref[1]; BTW, I’m still hoping that someone will help solve how to work the sudoku_excel.mod example in the ‘examples\sql’ directory of the GLPK directory under Windows 10 64bit. I still cannot get that to work. -Marc
