Select Columns: densify X

[ajdapretnar]

Orange version

3.5.dev

Expected behavior

Don't crash with resetting a sparse matrix in Select Columns.

Actual behavior

Test&Score crashes when a sparse class column on input.

Steps to reproduce the behavior

Corpus (bookexcerpts) - Bag of Words - Topic Modelling - Select Columns (put one topic in place of a category) - Test&Score.

Additional info (worksheets, data, screenshots, ...)

When checking a Data Table, the class column is sparse. I assume this is the issue.

[jerneju]

When checking a Data Table, the class column is sparse. I assume this is the issue.

Agree, this is the issue. But the actual problem is in Select Columns widget. It has to make class column(s) as dense array and not sparse. Y should be always dense.

[ajdapretnar]

Yeah, that makes sense.

[ajdapretnar]

Duplicate of #2498.