docs for groupindices has wrong example

[floswald]

hi,

I found here https://dataframes.juliadata.org/stable/lib/functions/#DataFrames.groupindices that i cannot run the example:

julia> df = DataFrame(id=["a", "c", "b", "b", "a"])
julia> gdf = groupby(df, :id);
julia> combine(gdf, groupindices)
ERROR: MethodError: no method matching groupindices(::SubDataFrame{DataFrame, DataFrames.Index, Vector{Int64}})
Closest candidates are:
  groupindices(::GroupedDataFrame) at ~/.julia/packages/DataFrames/JZ7x5/src/groupeddataframe/groupeddataframe.jl:359
Stacktrace:

[bkamins]

You are using a documentation for DataFrames.jl 1.4.2, while you are testing the code under some other version of DataFrames.jl (it is hard for me to identify it as I do not have this version installed so could you please check the version you use?).

[bkamins]

This is the output I get on DataFrames.jl 1.4.2:

julia> df = DataFrame(id=["a", "c", "b", "b", "a"])
5×1 DataFrame
 Row │ id
     │ String
─────┼────────
   1 │ a
   2 │ c
   3 │ b
   4 │ b
   5 │ a

julia> gdf = groupby(df, :id);

julia> combine(gdf, groupindices)
3×2 DataFrame
 Row │ id      groupindices
     │ String  Int64
─────┼──────────────────────
   1 │ a                  1
   2 │ c                  2
   3 │ b                  3

[floswald]

indeed i was on v1.3.6! sorry about that, should make a habit of checking for version.