Support additional data type

[BFalquet]

Using a column of class difftime as key or disp column in a listing is apparently not supported during export as txt and result in:

number of columns of matrices must match (see arg 2)

Could we consider less cryptic error message in formatters::export_as_txt, a warning in as_listing or just supporting this class ? Several users have come with the same issue.

Cheers

[gmbecker]

The issue is likely that the matrix_form method for listings doesn't understand how to format a difftime column, which begs the question, if they were going to support this, what is the desired behavior and how does it interact with the concept of formats in formatter

[BFalquet]

@gmbecker that is actually a good question, I am not sure what the users actually want. Maybe just a clearer error message would be enough.

[Melkiades]

Using a column of class difftime as key or disp column in a listing is apparently not supported during export as txt and result in:

number of columns of matrices must match (see arg 2)

Could we consider less cryptic error message in formatters::export_as_txt, a warning in as_listing or just supporting this class ? Several users have come with the same issue.

Cheers

We never supported that object in input. I think it was always transformed to character