Jan-Pieter, ArrayFire uses a modified CSR from the wikipedia documentation. Instead of just counts it has +/\ counts. It also has a leading 0 and a trailing value.
On Thu, Jan 27, 2022 at 3:50 AM Jan-Pieter Jacobs < [email protected]> wrote: > Thanks for the explanation Hauke. > I guess that shows that I never studied computer science. I expected rows > and cols to just be indices of the non-zero items, as 4&$. returns for J's > sparse arrays. > Anyone else wondering can refer to > https://en.m.wikipedia.org/wiki/Sparse_matrix where the CRS storage is > explained a little more. > > Jan-Pieter > > On Thu, Jan 27, 2022, 01:29 Hauke Rehr <[email protected]> wrote: > > > should have read > > the first entry in row x … > > where x is the index of the number in list rows, > > and n is that number > > > > Am 27.01.22 um 01:25 schrieb Hauke Rehr: > > > rows says: the first entry in col x is the n-th entry in values > > > > -- > > ---------------------- > > mail written using NEO > > neo-layout.org > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
