SparseBandedMatrices

A fast implementation of Sparse Banded Matrices in Julia. Primarily developed for use in a Butterfly LU factorization implemented in RecursiveFactorization.jl and LinearSolve.jl.

Examples

using SparseBandedMatrices

A = SparseBandedMatrix{Float64}(undef, 5, 5)
A[1,1] = 5
setdiagonal!(A, [3,4,5], true) # sets the third diagonal from the bottom to have the values 3, 4, and 5

B = SparseBandedMatrix{Float64}([1, 8], [[3], [-2, 5, 1, 3]], 6, 6)

Intended Considerations

The implementation of SparseBandedMatrices is designed to be fast for matrix and vector multiplications.