Missing functions in Explorer DataFrames/Series

Hi @sehHeiden,

The function is now on main (José reviews PRs quick!):

Add `day_of_year` and `week_of_year` by billylanchantin · Pull Request #717 · elixir-explorer/explorer · GitHub

So if you get the latest ref, you can now do:

[~D[2023-01-01], ~D[2023-01-08], ~D[2023-02-23]]
|> S.from_list()
|> S.week_of_year()
# #Explorer.Series<
#   Polars[3]
#   integer [52, 1, 8]
# >

Since you’re new to Elixir, you can get the latest ref by adding the following to your project’s mix.exs:

  # list of deps
  [
    # ...
    {:explorer,
     git: "https://github.com/elixir-explorer/explorer.git",
     # This is the current ref of main.
     # It may change, but as long as the ref is after this one,
     # you'll have access to the function.
     ref: "aef274989ab490b0a392ccd19ec24b286a8cda1c",
     override: true},
    # ...
  ]

There are other ways of doing this too, but that should get you started.