From: Nicolas Goaziou <n.goaziou@gmail.com>
To: Rasmus <rasmus@gmx.us>
Cc: emacs-orgmode@gnu.org
Subject: Re: Export tables as matrices (change tbl-export function on the fly)
Date: Sun, 18 Nov 2012 14:20:51 +0100 [thread overview]
Message-ID: <878v9zdp3g.fsf@gmail.com> (raw)
In-Reply-To: <87ehjr6sgl.fsf@pank.eu> (rasmus@gmx.us's message of "Sun, 18 Nov 2012 12:50:02 +0100")
Rasmus <rasmus@gmx.us> writes:
>> I meant: what is the exact problem with my code (with examples and
>> expected output if possible)? It shouldn't be hard to fix.
>
> They are not caught by the regexp. And I wasn't able to find a regexp
> which could correctly identify all cases. I have a sample in the
> footnote ¹
That's because you use "booktabs" by default. It creates horizontal
rules, and the filter hence doesn't apply.
> Sounds good to me. However, should $'s be stripped? Say I have an
> org-table which I'm indecisive about. In one sell I might have a
> \frac{·}{·} in a cell; so in a normal table export I'd have to insert
> $'s, but in :math-mode I wouldn't. It could thus be expensive to go
> from :math mode to nil math mode. Hence, stripping $ might be
> appropriate
Since e-latex back-end doesn't strip anything in regular LaTeX snippets
or environments, it should be the same here. Switching to math mode
won't happen automatically, so the user can act appropriately.
>> Then, the :environment keyword can be set to "tabular", "longtable",
>> "tabularx", "tabulary", "bmatrix", "pmatrix", "vmatrix", "kbordermatrix"
>> or "qbordermatrix". "bordermatrix", "array"... It would default to
>> `org-e-latex-default-table-environment' (default to "tabular").
>
> and Bmatrix ({matrix}) and Vmatrix ( ||matrix||) and matrix (no
> decoration).
:environment value is a string. It can be set to anything.
> Array needs per column configuration.
That's not a problem, Org handles alignment per column already:
| <c> | <c> |
| a | b |
| c | d |
Also, every math environment but "array" ignores column separators.
>> What is the variable ALIGN? You mean :align keyword? Do matrix
>> environments accept alignment? Also I haven't heard about starred
>> version of these. What do they do?
>
> They allow you to align a matrix to [rlc] (and maybe others?) They
> are defined in mathtools.
>
> Here's an example (unrelated to tables):
>
> #+BEGIN_SRC latex
> \documentclass{article}
> \usepackage{amsmath,mathtools}
> \begin{document}
> $\max_{x}f(x)\quad\text{s.t. }\left\{\begin{matrix*}[r]g(x)\geq0\\h(x)+h(y)\geq
> k\end{matrix*}\right.$
> \end{document}
> #+END_SRC
Then the backend can add the alignment as an optional argument in math
mode only when the name of the environment ends with a star and the
alignment string is one character long.
>> From the syntax perspective, I see no difference between bordered
>> matrices and the others: they just use a different environment, which
>> can be provided through :environment keyword. Am I missing something?
>
> No. But they are typically macros. Note the use of cr which
> sometimes needs to be used in the bordermatrix (from TeX). It's not
> the case in kbordermatrix (which I use) and presumably qbordermatrix.
>
> #+BEGIN_SRC latex
> \documentclass{article}
> \begin{document}
> $\bordermatrix{&a&b&c\cr a&1&0&0\cr b&0&1&0\cr c&0&0&1}$
> \end{document}
> #+END_SRC
To circumvent the problem, org-e-latex.el can use a defconst to store
table/matrix environments requiring "\cr" instead of "\\" at the end of
each row. It will, as a starter, only contain "bordermatrix".
Any name to suggest for it?
>>> - Potentially: an :inline exists s.t. if inline is t the
>>> matrix is typeset inline [i.e. with \(\)]. Perhaps, it
>>> should be smart and use the small verison of
>>> org-export-latex-tables-matrix-default-type. I.e. if
>>> bmatrix use bsmallmatrix. This could be set via
>>> org-export-latex-tables-matrix-inline-small.
>>
>> Do all matrix environments accept a small counterpart?
>
> amsmath provides:
> smallmatrix from which all variants be generated using
> appropriated \left "bracket" \right "bracket"
> mathtools provides:
> smallmatrix*
> psmallmatrix
> psmallmatrix*
> bsmallmatrix
> bsmallmatrix*
> Bsmallmatrix
> Bsmallmatrix*
> vsmallmatrix
> vsmallmatrix*
> Vsmallmatrix
> Vsmallmatrix*
> smallmatrix*
>
> so I think it covers all variants except "small bordermatrix" and
> "small arrary".
Ok. Then the sanest approach is to allow :math-mode to be set to nil,
t or `inline'. When `inline', as you suggest, it replaces \[...\] with
\(...\) and ignores any label. But it still uses whatever environment is
provided in :environment, that is, it won't make any guess about which
one to use.
Also, instead of using a single `org-e-latex-default-table-environment',
its value can be a plist like the following:
(:table-mode "tabular" :math-mode "bmatrix" :inline-math-mode "smallmatrix")
What do you think about it?
Regards,
--
Nicolas Goaziou
next prev parent reply other threads:[~2012-11-18 13:25 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-14 14:49 Export tables as matrices (change tbl-export function on the fly) Rasmus
2012-11-14 16:21 ` Nicolas Goaziou
2012-11-14 18:05 ` Rasmus
2012-11-17 13:26 ` Rasmus Pank Roulund
2012-11-17 15:32 ` Nicolas Goaziou
2012-11-17 18:29 ` Rasmus
2012-11-18 8:53 ` Nicolas Goaziou
2012-11-18 11:50 ` Rasmus
2012-11-18 13:20 ` Nicolas Goaziou [this message]
2012-11-18 14:05 ` Rasmus
2012-11-18 19:12 ` Nicolas Goaziou
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