API

ax = Axis(nt::NamedTuple)

Gives named component access for ComponentArrays.

Examples

julia> using ComponentArrays

julia> ax = Axis((a = 1, b = ViewAxis(2:7, PartitionedAxis(2, (a = 1, b = 2))), c = ViewAxis(8:10, (a = 1, b = 2:3))));

julia> A = [100, 4, 1.3, 1, 1, 4.4, 0.4, 2, 1, 45];

julia> ca = ComponentArray(A, ax)
ComponentVector{Float64}(a = 100.0, b = [(a = 4.0, b = 1.3), (a = 1.0, b = 1.0), (a = 4.4, b = 0.4)], c = (a = 2.0, b = [1.0, 45.0]))

julia> ca.a
100.0

julia> ca.b
3-element LazyArray{ComponentVector{Float64,SubArray...}}:
 ComponentVector{Float64,SubArray...}(a = 4.0, b = 1.3)
 ComponentVector{Float64,SubArray...}(a = 1.0, b = 1.0)
 ComponentVector{Float64,SubArray...}(a = 4.4, b = 0.4)

julia> ca.c
ComponentVector{Float64,SubArray...}(a = 2.0, b = [1.0, 45.0])

julia> ca.c.b
2-element view(::Vector{Float64}, 9:10) with eltype Float64:
  1.0
 45.0

x = ComponentArray(nt::NamedTuple)
x = ComponentArray(;kwargs...)
x = ComponentArray(data::AbstractVector, ax)
x = ComponentArray{T}(args...; kwargs...) where T

Array type that can be accessed like an arbitrary nested mutable struct.

Examples

julia> using ComponentArrays

julia> x = ComponentArray(a=1, b=[2, 1, 4], c=(a=2, b=[1, 2]))
ComponentVector{Int64}(a = 1, b = [2, 1, 4], c = (a = 2, b = [1, 2]))

julia> x.c.a = 400; x
ComponentVector{Int64}(a = 1, b = [2, 1, 4], c = (a = 400, b = [1, 2]))

julia> x[5]
400

julia> collect(x)
7-element Vector{Int64}:
   1
   2
   1
   4
 400
   1
   2

x = ComponentMatrix(data::AbstractMatrix, ax...)
x = ComponentMatrix{T}(data::AbstractMatrix, ax...) where T

A ComponentMatrix is an alias for a two-dimensional ComponentArray.

x = ComponentVector(nt::NamedTuple)
x = ComponentVector(;kwargs...)
x = ComponentVector(data::AbstractVector, ax)
x = ComponentVector{T}(args...; kwargs...) where T

A ComponentVector is an alias for a one-dimensional ComponentArray.

KeepIndex(idx)

Tag an index of a ComponentArray to retain it's Axis through indexing

LazyArray(gen::Base.Generator)

Wrapper around Base.Generator that also indexes like an array. This is needed to make ComponentArrays that hold arrays of ComponentArrays

pa = PartitionedAxis(partition_size, index_map)

Axis for creating arrays of ComponentArrays

sa = ShapedAxis(shape)

Preserves higher-dimensional array components in ComponentArrays (matrix components, for example)

va = ViewAxis(parent_index, index_map)

Axis for creating arrays of ComponentArrays

getaxes(x::ComponentArray)

Access .axes field of a ComponentArray. This is different than axes(x::ComponentArray), which returns the axes of the contained array.

Examples

julia> using ComponentArrays

julia> ax = Axis(a=1:3, b=(4:6, (a=1, b=2:3)))
Axis(a = 1:3, b = (4:6, (a = 1, b = 2:3)))

julia> A = zeros(6,6);

julia> ca = ComponentArray(A, (ax, ax))
6×6 ComponentMatrix{Float64} with axes Axis(a = 1:3, b = (4:6, (a = 1, b = 2:3))) × Axis(a = 1:3, b = (4:6, (a = 1, b = 2:3)))
 0.0  0.0  0.0  0.0  0.0  0.0
 0.0  0.0  0.0  0.0  0.0  0.0
 0.0  0.0  0.0  0.0  0.0  0.0
 0.0  0.0  0.0  0.0  0.0  0.0
 0.0  0.0  0.0  0.0  0.0  0.0
 0.0  0.0  0.0  0.0  0.0  0.0

julia> getaxes(ca)
(Axis(a = 1:3, b = (4:6, (a = 1, b = 2:3))), Axis(a = 1:3, b = (4:6, (a = 1, b = 2:3))))

getdata(x::ComponentArray)

Access .data field of a ComponentArray, which contains the array that ComponentArray wraps.

label2index(x::ComponentVector, str::AbstractString)
label2index(label_array, str::AbstractString)

Convert labels made by labels function to an array of flat indices of a ComponentVector.

Examples

julia> x = ComponentArray(a=5, b=[(a=(a=20,b=1), b=0), (a=(a=33,b=1), b=0)], c=(a=(a=2, b=[1,2]), b=[1. 2.; 5 6]))
ComponentVector{Float64}(a = 5.0, b = [(a = (a = 20.0, b = 1.0), b = 0.0), (a = (a = 33.0, b = 1.0), b = 0.0)], c = (a = (a = 2.0, b = [1.0, 2.0]), b = [1.0 2.0; 5.0 6.0]))

julia> ComponentArrays.labels(x)
14-element Vector{String}:
 "a"
 "b[1].a.a"
 "b[1].a.b"
 "b[1].b"
 "b[2].a.a"
 "b[2].a.b"
 "b[2].b"
 "c.a.a"
 "c.a.b[1]"
 "c.a.b[2]"
 "c.b[1,1]"
 "c.b[2,1]"
 "c.b[1,2]"
 "c.b[2,2]"

julia> ComponentArrays.label2index(x, "c.a")
3-element Vector{Int64}:
  8
  9
 10

julia> ComponentArrays.label2index(x, "b[1]")
3-element Vector{Int64}:
 2
 3
 4

see also labels

labels(x::ComponentVector)

Get string labels for for each index of a ComponentVector. Useful for automatic plot legend labelling.

Examples

julia> x = ComponentArray(a=5, b=[(a=(a=20,b=1), b=0), (a=(a=33,b=1), b=0)], c=(a=(a=2, b=[1,2]), b=[1. 2.; 5 6]))
ComponentVector{Float64}(a = 5.0, b = [(a = (a = 20.0, b = 1.0), b = 0.0), (a = (a = 33.0, b = 1.0), b = 0.0)], c = (a = (a = 2.0, b = [1.0, 2.0]), b = [1.0 2.0; 5.0 6.0]))

julia> ComponentArrays.labels(x)
14-element Vector{String}:
 "a"
 "b[1].a.a"
 "b[1].a.b"
 "b[1].b"
 "b[2].a.a"
 "b[2].a.b"
 "b[2].b"
 "c.a.a"
 "c.a.b[1]"
 "c.a.b[2]"
 "c.b[1,1]"
 "c.b[2,1]"
 "c.b[1,2]"
 "c.b[2,2]"

see also label2index

valkeys(x::ComponentVector)
valkeys(x::AbstractAxis)

Returns Val-wrapped keys of ComponentVector for fast iteration over component keys. Also works directly on an AbstractAxis.

Examples

julia> using ComponentArrays

julia> ca = ComponentArray(a=1, b=[1,2,3], c=(a=4,))
ComponentVector{Int64}(a = 1, b = [1, 2, 3], c = (a = 4))

julia> [ca[k] for k in valkeys(ca)]
3-element Array{Any,1}:
 1
  [1, 2, 3]
  ComponentVector{Int64,SubArray...}(a = 4)

julia> sum(prod(ca[k]) for k in valkeys(ca))
11