Re: [Orgmode] how to clear computed values

[Carsten Dominik]

> Just one more question. ;-}
> I would like to display the days between rows. I found time-date.el, 
> but
> this only works with:
>         The five data representations used are the following:
>
>         date
>                 An RFC822 (or similar) date string. For instance: "Sat
>                 Sep 12 12:21:54 1998 +0200".
>
>         time
>                 An internal Emacs time. For instance: (13818 26466).
>
>         seconds
>                 A floating point representation of the internal Emacs
>                 time. For instance: 905595714.0.
>
>         days
>                 An integer number representing the number of days since
>                 00000101. For instance: 729644.
>
>         decoded time
>                 A list of decoded time. For instance: (54 21 12 12 9
>                 1998 6 t 7200).
>
> Is there a way to work with dates like 2007-09-11?

You can use parse-time-string which can handle this.  It returns
a decoded time.

Even more general:
Org-mode has a very general time parsing function, org-read-date.  It
gobbles pretty much anything that looks like a date and/or date.
It normally reads from the user input, but you can also make it
read from a string:

(org-read-date t t "2007-02-03")

This will return an internal emacs time, time-date can take it from
there, for example use time-to-days to get an absolute day number.

- Carsten