[julia-users] Re: DataFrame Manipulation (like dplyr) Help

[Evan Fields]

I'm not sure if you'll find this any cleaner, but maybe something like

function summary2(df, queries...)
  d = Dict()
  for query in queries
    name = query[1]
    f = query[2]
    col = query[3]
    d[name] = f(df[col])
  end
  return d
end

Which could be used e.g.

julia> summary2(dat, ("mu_x", mean, :x), ("std_y", std, :y))
Dict{Any,Any} with 2 entries:
  "std_y" => 0.338854
  "mu_x"  => 0.438158

julia>

Admittedly this is less flexible, but perhaps more transparent.