From: frozenlock@gmail.com
To: Carsten Dominik <carsten.dominik@gmail.com>,
Frozenlock <frozenlock@gmail.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: Re: [O] Why does a column's name need to start with a letter? Changed source with no perceivable
Date: Sat, 05 Mar 2011 17:01:25 +0000 [thread overview]
Message-ID: <20cf307f34207bc00d049dbf36a2@google.com> (raw)
In-Reply-To: <EB6CF14F-58DB-4867-B8CF-74F1CEB193B0@gmail.com>
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Yes, it's very well explained, thank you.
I'll try to encode my names by removing any "-" and by adding a dummy
letter at the beginning.
Is there another way of doing simple database in org-mode? By putting a
component's name in a cell, I would like if the other columns could fill
them-self with the component's characteristics.
(My apologies for the double e-mail, the first one wasn't sent to the
mailing list)
On , Carsten Dominik <carsten.dominik@gmail.com> wrote:
> Hi Christian,
> On 5.3.2011, at 04:35, Frozenlock wrote:
> > Greetings,
> >
> > First and foremost, I must say I'ma new Org-mode user... as well as a
> new emacs user... and have only limited experience with lisp.
> >
> > I'm using a table in org-mode as a database, from which I retrieve
> information as needed from other tables.
> > This database stores multiples components with names starting by
> numbers and with the character "-" in them. For example: "10K-AN-D8".
> > I want to be able to refer to its column with $10K-AN-D8. Yet, this is
> impossible at the moment.
> >
> > I've looked in org-table.el and found, at line 2038:
> >
> > (if (string-match "^[a-zA-Z][a-zA-Z0-9]*$" name)
> >
> > which, once replaced by this:
> >
> > (if (string-match "^[-_a-zA-Z0-9]*$" name)
> >
> > Provides me with the ability to name (and refer) columns in any way I
> want.
> >
> > However, I'm reluctant to use this feature; surely there was a reason
> for this limitation.
> > Could someone point it out for me?
> This is limitation is present to disambiguate formulas.
> In you example $10K-AN-D8, D8 is already a field reference,
> so Org does not know if you mean $10K-AN - @8$4.
> Furthermore, you could easily arrive at variables like
> $10-AN-D8, and then what should the $10 mean?
> Of cause one could disambiguate heuristically by checking
> which names have been defined. In fact, name replacement
> happens first, and this is why your patch appears to
> work. But the side effect would be that introducing
> new names could change the interpretation of an
> existing equation. All this is unstable and
> unpredictable.
> Hope this makes it clear.
> - Carsten
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prev parent reply other threads:[~2011-03-05 17:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-05 3:35 Why does a column's name need to start with a letter? Changed source with no perceivable side-effects Frozenlock
2011-03-05 7:41 ` Carsten Dominik
2011-03-05 17:01 ` frozenlock [this message]
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