Get finite element vector coefficients index by index.
Get finite element vector coefficients index by index. The layout of the data in values is determined by the routine HYPRE_SStructGridSetFEMOrdering. Users must first call the routine HYPRE_SStructVectorGather to ensure that data owned by multiple processes is correct.If the vector is complex, then values consists of pairs of doubles representing the real and imaginary parts of each complex value.