On Sunday, March 27, 2016 06:43:19 PM Sheehan Olver wrote: > I've split out the BandedMatrix data structure in BandedMatrices.jl: > > https://github.com/ApproxFun/BandedMatrices.jl > > Right now the entries are in the "wrong" order for LAPack: the rows are > stored (instead of the columns) . I'm debating whether to support both > orderings, or replace the current implementation with the "correct" column > version.
You internal debate is also going on elsewhere: https://github.com/JuliaLang/julia/issues/4774#issuecomment-149349751 https://github.com/JuliaLang/julialang.github.com/blob/teh/arrays/blog/_posts/2016-03-27-arrays-iteration.md#row-major-matrices-permuteddimensionarrays-and-taking-transposes-seriously Best, --Tim > > On Thursday, March 24, 2016 at 9:10:12 AM UTC+11, Tony Kelman wrote: > > +1 for a specific standalone BandedMatrices package. Once it's up and > > running and registered, could even move the Lapack bindings for gb* > > functions out to the package (and pb* and sb* if you also have symmetric), > > since we don't have a type for them in base. I think it'll be important to > > work out how to get base to support additional sparse and structured > > matrix > > formats well, without needing to have the types themselves in base. > > > > On Wednesday, March 23, 2016 at 2:43:16 PM UTC-7, Sheehan Olver wrote: > >> It would be great to have a broader SparseFormats.jl package. > >> > >> Maybe in the time being I'll start it as BandedMatrices.jl (since that's > >> already implemented) which can be renamed later. > >> > >> Sheehan > >> > >> Sent from my iPhone > >> > >> On 24 Mar 2016, at 03:07, Christoph Ortner <christop...@gmail.com> wrote: > >> > >> Here is a short list that in the long-run would be useful: > >> * compressed row > >> * triplet > >> * block-sparse matrices > >> (* linked-list variants of CC and CR??) > >> > >> C > >> > >> On Wednesday, 23 March 2016 13:53:30 UTC, Tim Holy wrote: > >>> Base has UniformScaling, Diagonal, Bidiagonal, Tridiagonal, > >>> SymTridiagonal, > >>> UpperTriangular, LowerTriangular, in addition to SparseVector and > >>> SparseMatrixCSC. But not general banded. > >>> > >>> --Tim > >>> > >>> On Wednesday, March 23, 2016 04:19:22 AM Christoph Ortner wrote: > >>> > I'd be interested as well; more generally: does Julia still only have > >>> > >>> CCS > >>> > >>> > implemented? For me it would sound productive to start a general > >>> > SparseFormats.jl (or similar) package and collect various other > >>> > >>> formats, > >>> > >>> > which could eventually be incorporated into Base or a > >>> > >>> standard-library. > >>> > >>> > Christoph
