>>> "t" == tbanelwebmin  <tbanelwebmin@free.fr> writes:

> The orgtbl-arggregate package (on Melpa and GitHub) does that.
> Horizontal lines are converted to empty columns.
> Transposing again recreates the original horizontal lines.

> Beware, as opposed to org-table-transpose-table-at-point, it does not modify the source table, it creates a new transposed table.

> Type C-c C-x x in an empty space in the buffer
> Then answer "transpose", and follow the wizard.

Thanks
I will have a look!