This was a feature that sorta existed for a while (see https://github.com/JuliaStats/DataFrames.jl/issues/24 ), but nobody was very happy with it, and I think John ripped it out as part of one of his simplification passes. It's tricky to think about how best to implement this sort of feature when you aspirationally want to support memory-mapped and distributed structures too, and where you want a semantics that's explicitly set-like, cf Pandas or R's data.tables.
Also worth thinking about this in the context of John's just-announced goals: https://gist.github.com/johnmyleswhite/ad5305ecaa9de01e317e On Sun, Sep 7, 2014 at 12:54 PM, John Myles White <johnmyleswh...@gmail.com> wrote: > No, DataFrames are not indexed. For now, you’d need to build a wrapper > that indexes a DataFrame to get that kind of functionality. > > — John > > On Sep 7, 2014, at 9:53 AM, Steven Sagaert <steven.saga...@gmail.com> > wrote: > > > Hi, > > I was wondering if searching in a dataframe is indexed (in the DB sense, > not array sense. e.g. a tree index structure) or not? If so can you have > multiple indices (on multiple columns) or not? > >
