INSERT_VALUES is clearly an error, but we can't check that easily so you will probably just get the last value, and ADD_VALUES should work.
Mark On Tue, Jan 14, 2025 at 8:20 AM Venkata Narayana Sarma Dhavala < dhav...@udel.edu> wrote: > Dear PETSc Development Team, > > I hope this message finds you well. I am currently working with the > VecSetValues() function in PETSc, and I have a question regarding its > behavior when there are duplicate indices in the input array. > > PetscErrorCode VecSetValues(Vec x, PetscInt ni, const PetscInt ix[], const > PetscScalar y[], InsertMode iora) > > Specifically, what is the expected behavior if the ix[] array passed to > VecSetValues() contains duplicate indices? Does the function overwrite the > value at those indices, or does it handle duplicates differently depending > on the insert mode (INSERT_VALUES or ADD_VALUES)? > > I would greatly appreciate any clarification on this matter, as it will > help me better understand how to manage values when working with > potentially repeated indices in the input. > > Thank you for your time and assistance. > > Best regards, > > Narayana Dhavala. >
