[Arrays](@id lib-arrays)

# [Arrays](@id lib-arrays) ## Basic functions ```@docs Base.ndims Base.size Base.indices(::Any) Base.indices(::AbstractArray, ::Any) Base.length(::AbstractArray) Base.eachindex Base.linearindices Base.IndexStyle Base.countnz Base.conj! Base.stride Base.strides Base.ind2sub Base.sub2ind Base.LinAlg.checksquare ``` ## Constructors ```@docs Core.Array Base.getindex(::Type, ::Any...) Base.zeros Base.ones Base.BitArray Base.trues Base.falses Base.fill Base.fill! Base.similar(::AbstractArray) Base.similar(::Any, ::Tuple) Base.eye Base.linspace Base.logspace Base.Random.randsubseq Base.Random.randsubseq! ``` ## Broadcast and vectorization See also the [dot syntax for vectorizing functions](@ref man-vectorized); for example, `f.(args...)` implicitly calls `broadcast(f, args...)`. Rather than relying on "vectorized" methods of functions like `sin` to operate on arrays, you should use `sin.(a)` to vectorize via `broadcast`. ```@docs Base.broadcast Base.Broadcast.broadcast! Base.@__dot__ Base.Broadcast.broadcast_getindex Base.Broadcast.broadcast_setindex! ``` ## Indexing and assignment ```@docs Base.getindex(::AbstractArray, ::Any...) Base.setindex!(::AbstractArray, ::Any, ::Any...) Base.copy!(::AbstractArray, ::CartesianRange, ::AbstractArray, ::CartesianRange) Base.isassigned Base.Colon Base.CartesianIndex Base.CartesianRange Base.to_indices Base.checkbounds Base.checkindex ``` ## Views (SubArrays and other view types) ```@docs Base.view Base.@view Base.@views Base.parent Base.parentindexes Base.slicedim Base.reinterpret Base.reshape Base.squeeze Base.vec ``` ## Concatenation and permutation ```@docs Base.cat Base.vcat Base.hcat Base.hvcat Base.flipdim Base.circshift Base.circshift! Base.circcopy! Base.contains(::Function, ::Any, ::Any) Base.find(::Any) Base.find(::Function, ::Any) Base.findn Base.findnz Base.findfirst(::Any) Base.findfirst(::Any, ::Any) Base.findfirst(::Function, ::Any) Base.findlast(::Any) Base.findlast(::Any, ::Any) Base.findlast(::Function, ::Any) Base.findnext(::Any, ::Integer) Base.findnext(::Function, ::Any, ::Integer) Base.findnext(::Any, ::Any, ::Integer) Base.findprev(::Any, ::Integer) Base.findprev(::Function, ::Any, ::Integer) Base.findprev(::Any, ::Any, ::Integer) Base.permutedims Base.permutedims! Base.PermutedDimsArray Base.promote_shape ``` ## Array functions ```@docs Base.accumulate(::Any, ::Any, ::Integer) Base.accumulate! Base.cumprod Base.cumprod! Base.cumsum Base.cumsum! Base.cumsum_kbn Base.LinAlg.diff Base.LinAlg.gradient Base.rot180 Base.rotl90 Base.rotr90 Base.reducedim Base.mapreducedim Base.mapslices Base.sum_kbn ``` ## Combinatorics ```@docs Base.Random.randperm Base.invperm Base.isperm Base.permute!(::Any, ::AbstractVector) Base.ipermute! Base.Random.randcycle Base.Random.shuffle Base.Random.shuffle! Base.reverse Base.reverseind Base.reverse! ``` ## BitArrays `BitArray`s are space-efficient "packed" boolean arrays, which store one bit per boolean value. They can be used similarly to `Array{Bool}` arrays (which store one byte per boolean value), and can be converted to/from the latter via `Array(bitarray)` and `BitArray(array)`, respectively. ```@docs Base.flipbits! Base.rol! Base.rol Base.ror! Base.ror ``` ## Sparse Vectors and Matrices Sparse vectors and matrices largely support the same set of operations as their dense counterparts. The following functions are specific to sparse arrays. ```@docs Base.SparseArrays.sparse Base.SparseArrays.sparsevec Base.SparseArrays.issparse Base.full Base.SparseArrays.nnz Base.SparseArrays.spzeros Base.SparseArrays.spones Base.SparseArrays.speye(::Type, ::Integer, ::Integer) Base.SparseArrays.speye(::SparseMatrixCSC) Base.SparseArrays.spdiagm Base.SparseArrays.sprand Base.SparseArrays.sprandn Base.SparseArrays.nonzeros Base.SparseArrays.rowvals Base.SparseArrays.nzrange Base.SparseArrays.dropzeros!(::SparseMatrixCSC, ::Bool) Base.SparseArrays.dropzeros(::SparseMatrixCSC, ::Bool) Base.SparseArrays.dropzeros!(::SparseVector, ::Bool) Base.SparseArrays.dropzeros(::SparseVector, ::Bool) Base.SparseArrays.permute Base.permute!{Tv, Ti, Tp <: Integer, Tq <: Integer}(::SparseMatrixCSC{Tv,Ti}, ::SparseMatrixCSC{Tv,Ti}, ::AbstractArray{Tp,1}, ::AbstractArray{Tq,1}) ```

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