Now I get it. Thank you for explanation.


On Sat, Oct 14, 2023 at 9:39 PM Ihor Radchenko <yantar92@posteo.net> wrote:

> Sławomir Grochowski <slawomir.grochowski@gmail.com> writes:
>
> > But I'm talking about:
> > (":mean" . org-columns--summary-mean-time)
> > not  ("@mean" . org-columns--summary-mean-age).
> >
> > So this is the right function (":mean" . org-columns--summary-mean-time)?
> > Or do I need to write a new one?
>
> I think you still need to write a new one.
>
> @mean works on (1) timestamps; (2) durations, while :mean works only on
> durations.
>
> --
> Ihor Radchenko // yantar92,
> Org mode contributor,
> Learn more about Org mode at <https://orgmode.org/>.
> Support Org development at <https://liberapay.com/org-mode>,
> or support my work at <https://liberapay.com/yantar92>
>