GetColumn.jl

Get a column from a Vector, Matrix, 3D Array, DataFrame, or TimeSeries.

Copyright © 2018 by Jeffrey Sarnoff. Released under the MIT License.

---

As other datatable packages become v0.7.0- compatible, more will be supported.

---

Exports

getcolumn

Examples

julia> using Dates, DataFrames, TimeSeries, GetColumn

julia> colA = [4,3,2,1];
julia> colB = [7,8,9,10];

julia> colsAB = hcat(colA, colB);
julia> colsABC = reshape(colsAB, (2,2,2))

julia> df = DataFrame(ColA = colA, ColB = colB);

julia> dates = collect((Date(Dates.now())-Day(3)):Day(1):Date(Dates.now()));
julia> ta = TimeArray(dates, colsAB, ["ColA","ColB"]);

julia> getcolumn(colA, 1) == colA
true
julia> getcolumn(colsAB, 2) == colB
true

julia> getcolumn(colsABC, (1,2,0)) == colsABC[1,2,:]
true
julia> getcolumn(colsABC, (2,0,1)) == colsABC[2,:,1]
true

julia> getcolumn(df, "ColA") == colA
true
julia> getcolumn(df, :ColB) == colB
true

julia> getcolumn(ta, :ColA) == colA
true
julia> getcolumn(ta, "ColB") == colB
true

Until TimeSeries.jl is v0.7.0- compat, the last line shows warnings.