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Merged
merged 2 commits into from
Oct 14, 2023
Merged

add weaklaplacian #165

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852f752
add weaklaplacian
dlfivefifty Oct 14, 2023
dd245a3
add test
dlfivefifty Oct 14, 2023
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2 changes: 1 addition & 1 deletion Project.toml
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
name = "ContinuumArrays"
uuid = "7ae1f121-cc2c-504b-ac30-9b923412ae5c"
version = "0.16.2"
version = "0.16.3"

[deps]
AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"
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5 changes: 5 additions & 0 deletions src/bases/bases.jl
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Expand Up @@ -637,13 +637,18 @@ end
grammatrix(A) = grammatrix_layout(MemoryLayout(A), A)
grammatrix_layout(_, A) = error("Not implemented")


function grammatrix_layout(::MappedBasisLayouts, P)
Q = demap(P)
kr = basismap(P)
@assert kr isa AbstractAffineQuasiVector
grammatrix(Q)/kr.A
end

weaklaplacian(A) = weaklaplacian_layout(MemoryLayout(A), A)
weaklaplacian_layout(_, A) = weaklaplacian_axis(axes(A,1), A)
weaklaplacian_axis(::Inclusion{<:Number}, A) = -(diff(A)'diff(A))

function copy(M::Mul{<:AdjointMappedBasisLayouts, <:MappedBasisLayouts})
A = M.A'
kr = basismap(A)
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4 changes: 3 additions & 1 deletion test/test_splines.jl
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@@ -1,7 +1,7 @@
using ContinuumArrays, LinearAlgebra, Base64, FillArrays, QuasiArrays, BandedMatrices, Test
using QuasiArrays: ApplyQuasiArray, ApplyStyle, MemoryLayout, mul, MulQuasiMatrix, Vec
import LazyArrays: MulStyle, LdivStyle, arguments, applied, apply
import ContinuumArrays: basis, AdjointBasisLayout, ExpansionLayout, BasisLayout, SubBasisLayout, AdjointMappedBasisLayouts, MappedBasisLayout, plan_grid_transform
import ContinuumArrays: basis, AdjointBasisLayout, ExpansionLayout, BasisLayout, SubBasisLayout, AdjointMappedBasisLayouts, MappedBasisLayout, plan_grid_transform, weaklaplacian

@testset "Splines" begin
@testset "HeavisideSpline" begin
Expand Down Expand Up @@ -241,6 +241,8 @@ import ContinuumArrays: basis, AdjointBasisLayout, ExpansionLayout, BasisLayout,
@test A isa BandedMatrix
@test A == (D*L)'*(D*L) == [1.0 -1 0; -1.0 2.0 -1.0; 0.0 -1.0 1.0]
@test bandwidths(A) == (1,1)

@test weaklaplacian(L) == -A
end

@testset "Views" begin
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