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.
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 <[email protected]> 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
>>>
>>>
