Coverage

>>> from techminer2.database.tools import Coverage
>>> (
...     Coverage()
...     #
...     .with_field("raw_author_keywords")
...     #
...     .where_root_directory_is("example/")
...     .where_database_is("main")
...     .where_record_years_range_is(None, None)
...     .where_record_citations_range_is(None, None)
...     #
...     .run()
... )
--INFO-- Number of documents : 50
--INFO--   Documents with NA : 12
--INFO--  Efective documents : 38
   min_occ  cum_sum_documents  coverage  cum num items
0       31                 31   81.58 %              1
1        7                 33   86.84 %              2
2        4                 33   86.84 %              3
3        3                 35   92.11 %              7
4        2                 36   94.74 %             25
5        1                 38  100.00 %            148