Suggestion - Matrix Syntax for hcat (as well as vcat)

[Lincoln-Hannah]

Suggestion - Matrix Syntax for hcat (as well as vcat)

[bkamins]

Yes - we can consider adding hvcat in the next release.

[Lincoln-Hannah]

I often vcat a vector of DataFrames.
I don't think there is an easy way to add a column to show which vector element each dataframe came from.
This would be really useful. Something like:

vcat( [
    DataFrame(a=1:2,b=1:2) 
    DataFrame(a=3:4,b=3:4) 
]...,   
    extracolumn = :c => [  "df1",   "df2"  ]
)

output

:a   :b   :c
1    1    "df1"
2    2    "df1"
3    2    "df2"
4    2    "df2"

[bkamins]

julia> vcat(DataFrame(a=1:2,b=1:2), DataFrame(a=3:4,b=3:4),
           source = :c => [  "df1",   "df2"  ])
4×3 DataFrame
 Row │ a      b      c
     │ Int64  Int64  String
─────┼──────────────────────
   1 │     1      1  df1
   2 │     2      2  df1
   3 │     3      3  df2
   4 │     4      4  df2

[Lincoln-Hannah]

Thank you