[petsc-users] To store the matrix.

[Jed Brown]

On Thu, Jul 14, 2011 at 13:18, Xuefei (Rebecca) Yuan <xyuan at lbl.gov> wrote:

> I would like to store this sparse MXN matrix A in the following form:
> ....................................................
>
> line1:  M       N       numberofnonzeros
> line2:  i       j       value
> line3:  i       j       value
>

This "COO" format is not an efficient representation. Why do you want to
store it this way?

(You can produce this by getting the AIJ structure, allocating a new array
for the row indices, and filling it redundantly from the AIJ structure.
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