julia> cat(a, b; dims=(1, 2)) 2×6 Matrix{Int64}: 1 2 3 0 0 0 0 0 0 4 5 6 Extended Help Concatenate 3D arrays: julia> a = ones(2, 2, 3); julia> b = ones(2, 2, 4); julia> c = cat(a, b; dims=3);CHAPTER row (2, 1, 1) _______ _ 3 1 = elements in each column (3, 1) _____________ 4 = elements in each 3d slice (4,) _____________ 4 = elements in each 4d slice (4,) ⇒ shape = ((2, 1, 1), (3, 1), (4,), IndexLinear to the extent that it is possible. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64, 3}, :, 1

julia> cat(a, b; dims=(1, 2)) 2×6 Matrix{Int64}: 1 2 3 0 0 0 0 0 0 4 5 6 Extended Help Concatenate 3D arrays: julia> a = ones(2, 2, 3); julia> b = ones(2, 2, 4); julia> c = cat(a, b; dims=3);CHAPTER row (2, 1, 1) _______ _ 3 1 = elements in each column (3, 1) _____________ 4 = elements in each 3d slice (4,) _____________ 4 = elements in each 4d slice (4,) ⇒ shape = ((2, 1, 1), (3, 1), (4,), IndexLinear to the extent that it is possible. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64, 3}, :, 1

julia> cat(a, b; dims=(1, 2)) 2×6 Matrix{Int64}: 1 2 3 0 0 0 0 0 0 4 5 6 Extended Help Concatenate 3D arrays: julia> a = ones(2, 2, 3); julia> b = ones(2, 2, 4); julia> c = cat(a, b; dims=3);CHAPTER row (2, 1, 1) _______ _ 3 1 = elements in each column (3, 1) _____________ 4 = elements in each 3d slice (4,) _____________ 4 = elements in each 4d slice (4,) ⇒ shape = ((2, 1, 1), (3, 1), (4,), IndexLinear to the extent that it is possible. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64, 3}, :, 1

julia> cat(a, b; dims=(1, 2)) 2×6 Matrix{Int64}: 1 2 3 0 0 0 0 0 0 4 5 6 Extended Help Concatenate 3D arrays: julia> a = ones(2, 2, 3); julia> b = ones(2, 2, 4); julia> c = cat(a, b; dims=3); julia> row (2, 1, 1) _______ _ 3 1 = elements in each column (3, 1) _____________ 4 = elements in each 3d slice (4,) _____________ 4 = elements in each 4d slice (4,) ⇒ shape = ((2, 1, 1), (3, 1), (4,), IndexLinear to the extent that it is possible. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64, 3}, :, 1

julia> cat(a, b; dims=(1, 2)) 2×6 Matrix{Int64}: 1 2 3 0 0 0 0 0 0 4 5 6 Extended Help Concatenate 3D arrays: julia> a = ones(2, 2, 3); julia> b = ones(2, 2, 4); julia> c = cat(a, b; dims=3); julia> row (2, 1, 1) _______ _ 3 1 = elements in each column (3, 1) _____________ 4 = elements in each 3d slice (4,) _____________CHAPTER 48. ARRAYS 1088 4 = elements in each 4d slice (4,) ⇒ shape = ((2 IndexLinear to the extent that it is possible. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64, 3}, :, 1

julia> cat(a, b; dims=(1, 2)) 2×6 Matrix{Int64}: 1 2 3 0 0 0 0 0 0 4 5 6 Extended Help Concatenate 3D arrays: julia> a = ones(2, 2, 3); julia> b = ones(2, 2, 4); julia> c = cat(a, b; dims=3); julia> row (2, 1, 1) _______ _ 3 1 = elements in each column (3, 1) _____________ 4 = elements in each 3d slice (4,) _____________CHAPTER 48. ARRAYS 1087 4 = elements in each 4d slice (4,) ⇒ shape = ((2 IndexLinear to the extent that it is possible. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64, 3}, :, 1

julia> cat(a, b; dims=(1, 2)) 2×6 Matrix{Int64}: 1 2 3 0 0 0 0 0 0 4 5 6 Extended Help Concatenate 3D arrays: julia> a = ones(2, 2, 3); julia> b = ones(2, 2, 4); julia> c = cat(a, b; dims=3); julia> row (2, 1, 1) _______ _ 3 1 = elements in each column (3, 1) _____________ 4 = elements in each 3d slice (4,) _____________CHAPTER 48. ARRAYS 1087 4 = elements in each 4d slice (4,) ⇒ shape = ((2 IndexLinear to the extent that it is possible. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64, 3}, :, 1

julia> cat(a, b; dims=(1, 2)) 2×6 Matrix{Int64}: 1 2 3 0 0 0 0 0 0 4 5 6 Extended Help Concatenate 3D arrays: julia> a = ones(2, 2, 3); julia> b = ones(2, 2, 4); julia> c = cat(a, b; dims=3); julia> row (2, 1, 1) _______ _ 3 1 = elements in each column (3, 1) _____________ 4 = elements in each 3d slice (4,) _____________CHAPTER 47. ARRAYS 1079 4 = elements in each 4d slice (4,) ⇒ shape = ((2 IndexLinear to the extent that it is possible. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64, 3}, :, 1

expression A[5] returns the value 5. Julia allows you to combine these styles of indexing: for example, a 3d array A3 can be indexed as A3[i,j], in which case i is interpreted as a cartesian index for the first terms of cartesian, rather than linear, indexing. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64,3}, :, 1,

julia> cat(a, b; dims=(1, 2)) 2×6 Matrix{Int64}: 1 2 3 0 0 0 0 0 0 4 5 6 Extended Help Concatenate 3D arrays: julia> a = ones(2, 2, 3); julia> b = ones(2, 2, 4); julia> c = cat(a, b; dims=3); CHAPTER row (2, 1, 1) _______ _ 3 1 = elements in each column (3, 1) _____________ 4 = elements in each 3d slice (4,) _____________ 4 = elements in each 4d slice (4,) ⇒ shape = ((2, 1, 1), (3, 1), (4,), IndexLinear to the extent that it is possible. Index replacement Consider making 2d slices of a 3d array: julia> A = rand(2,3,4); julia> S1 = view(A, :, 1, 2:3) 2×2 view(::Array{Float64, 3}, :, 1