MetadataArrays
Implementation of arrays with metadata.
Metadata Arrays
A MetadataArray is a an Array, together with some metadata.
julia> v = ["John", "John", "Jane", "Louise"];
julia> s = MetadataArray(v, Dict("John" => "Treatment", "Louise" => "Placebo", "Jane" => "Placebo"))
4-element MetadataArrays.MetadataArray{String,Dict{String,String},1,Array{String,1}}:
"John"
"John"
"Jane"
"Louise"The parent AbstractArray as well as the metadata can be recovered with parent and metadata respectively.
julia> parent(s)
4-element Array{String,1}:
"John"
"John"
"Jane"
"Louise"
julia> metadata(s)
Dict{String,String} with 3 entries:
"John" => "Treatment"
"Jane" => "Placebo"
"Louise" => "Placebo"metadata is preserved when taking views:
julia> metadata(view(s, 1:2))
Dict{String,String} with 3 entries:
"John" => "Treatment"
"Jane" => "Placebo"
"Louise" => "Placebo"s can be used as a regular AbstractArray (meaning all operations that work on AbstractArray should work on a MetadataArray out of the box.