Negative axis

[BalzaniEdoardo]

• Fix the split by features with negative axis.
• Generalized functions that receive axis when possible (i.e. when the input is an array)
• Added test for negative axis

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.40%. Comparing base (913bc20) to head (18cb2f3).

Additional details and impacted files

@@             Coverage Diff              @@
##           development     #301   +/-   ##
============================================
  Coverage        97.40%   97.40%           
============================================
  Files               35       35           
  Lines             2854     2857    +3     
============================================
+ Hits              2780     2783    +3     
  Misses              74       74           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.