Does this answer your question?
#+NAME: tt
| num | ID |
|-----+----|
| 1 | A |
| 2 | B |
| 3 | C |
| 4 | |
| 5 | E |
#+BEGIN_SRC emacs-lisp :var tt=tt
(length tt)
#+END_SRC
#+RESULTS:
: 5
Best wishes,
Neil
On Wed, 18 Sep 2019 at 18:39, Nathan Neff <nathan.n...@gmail.com> wrote:
> Hello all,
>
> I have a table like this:
>
>
> | ID |
> |----|
> | 2 |
> | 3 |
>
> and I want to know how many rows there are w/o the ID heading
> and w/o the horizontal separator. I found the
> org-table-toggle-coordinate-overlays
> which displays an overlay showing the row number:
>
> https://www.evernote.com/l/AOJvD5ty6RRIBYAcSWV-047CKCHT5NIAhl8
>
> However, the heading is included in the row number (which makes sense).
>
> Is there a way to ignore lines above a heading (or mark a heading in some
> way?
>
> I found a way to add a seq. number by using Calc [1] but I was wondering if
> there's a way to tell the org-table-toggle-coordinate-overlays not to
> count the
> heading.
>
> Thanks,
> --Nate
>
> [1]
>
>
> | num | ID |
> |-----+----|
> | 1 | A |
> | 2 | B |
> | 3 | C |
> | 4 | |
> | 5 | E |
> #+TBLFM: $1=vlen(@I..0)
>
>
> https://stackoverflow.com/questions/9267050/how-to-achieve-a-row-index-column-in-emacs-org-mode-using-a-calc-column-rule
>
>
>
