Please, could you provide a minimal working example (or link) of how to do
this?
Thank you.
Em ter., 20 de jun. de 2023 às 15:08, Matthew Knepley
escreveu:
> On Tue, Jun 20, 2023 at 2:02 PM Diego Magela Lemos
> wrote:
>
>> So... what do I need to do, please?
>> Why am I getting wrong results
So... what do I need to do, please?
Why am I getting wrong results when solving the linear system if the matrix
is filled in with MatSetPreallocationCOO and MatSetValuesCOO?
Em ter., 20 de jun. de 2023 às 14:56, Jed Brown escreveu:
> Matthew Knepley writes:
>
> >> The matrix entries are
un. de 2023 às 13:13, Barry Smith
escreveu:
>
> Since you have 6 entries that needed to be added to the matrix you will
> need to call MatSetValues() six time for the six entries.
>
> On Jun 20, 2023, at 11:06 AM, Matthew Knepley wrote:
>
> On Tue, Jun 20, 2023 at 10:55 AM
Considering, for instance, the following COO sparse matrix format, with
repeated indices:
std::vector rows{0, 0, 1, 2, 3, 4};
std::vector cols{0, 0, 1, 2, 3, 4};
std::vector values{2, -1, 2, 3, 4, 5};
that represents a 5x5 diagonal matrix A.
So far, the code that I have is:
//
