[Help-glpk] Re: loading constraint coefficients

[Andrew Makhorin]

>The problem is that in each row of the matrix, there
>are some coefficients with zero elements, this has
>cause a problem when i use load_mat3 to load these
>coefficients. 
>
>May i know how can i load these coefficients without
>modification of the zero elements in the matrix. Thank
>you very much

Before call to lpx_load_mat3 you can eliminate zero coefficients in the
following way:

   ...
   {  int k, newnz = 0;
      for (k = 1; k <= nz; k++)
      {  if (a[k] != 0.0)
         {  newnz++;
            rn[newnz] = rn[k];
            cn[newnz] = cn[k];
            a[newnz] = a[k];
         }
      }
      nz = newnz;
   }
   lpx_load_mat3(lp, nz, rn, cn, a);
   ...