Re: Sparse matrix formats

2019-03-13 Thread Jed Brown
Kenta Murata writes: > Hi Jed, > > I'd like to describe the current status of the implementation of SparseTensor. > I hope the following explanation will help you. > > First of all, I designed the current SparseTensor format as the first > interim implementation. > At this time I used scipy.spars

Re: Sparse matrix formats

2019-03-13 Thread Kenta Murata
Hi Jed, I'd like to describe the current status of the implementation of SparseTensor. I hope the following explanation will help you. First of all, I designed the current SparseTensor format as the first interim implementation. At this time I used scipy.sparse as a reference. The reason why I s

Re: Sparse matrix formats

2019-03-11 Thread Jed Brown
Thanks. I'm new to the Arrow community so was hoping to get feedback if any of these are controversial or subject to constraints that I'm likely not familiar with. Point 2 is likely simplest and I can start with that. Point 3 isn't coherent as a PR concept, but is a potential audience whose rela

Re: Sparse matrix formats

2019-03-11 Thread Wes McKinney
hi Jed, Would you like to submit a pull request to propose the changes or additions you are escribing? Thanks Wes On Sat, Mar 9, 2019 at 11:32 PM Jed Brown wrote: > > Wes asked me to bring this discussion here. I'm a developer of PETSc > and, with Arrow is getting into the sparse representatio

Sparse matrix formats

2019-03-09 Thread Jed Brown
Wes asked me to bring this discussion here. I'm a developer of PETSc and, with Arrow is getting into the sparse representation space, would like for it to interoperate as well as possible. 1. Please guarantee support for 64-bit offsets and indices. The current spec uses "long", which is 32-bit o