The documentation for the Dataset class is ambiguous and confusing. In particular it's hard to follow which functions return a reference to the current Dataset (like transform) after modification in place and which (like filter) make return a newly created dataset copying some or all of the current dataset. In particular the way the filter function is described implies modification in place which is not what it does.
The documentation for the Dataset class is ambiguous and confusing. In particular it's hard to follow which functions return a reference to the current Dataset (like transform) after modification in place and which (like filter) make return a newly created dataset copying some or all of the current dataset. In particular the way the filter function is described implies modification in place which is not what it does.