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Re: [O] Bug: Babel: asymptote: erroneous conversion of heterogeneous-typ


From: Nicolas Goaziou
Subject: Re: [O] Bug: Babel: asymptote: erroneous conversion of heterogeneous-typed table
Date: Mon, 29 Aug 2011 14:50:53 +0200

András Major <address@hidden> writes:

>> Why? You can always write an intermediary step to "stringify" every
>> cell. Choose your language. Nick Dokos showed you one way.
>
> Apparently, only if you set a global/per-user option in .emacs or suchlike,
> which I think is a bad way of doing it.
-----
#+tblname: mixed-types
|1|x|5|
|3|y|4|

#+source: stringify(table=mixed-types)
#+begin_src emacs-lisp
(concat "string[][] myvar={{"
        (mapconcat
         (lambda (row)
           (when (listp row)
             (concat (mapconcat (lambda (el) (format "\"%s\"" el)) row ",") 
"}")))
         table
         ",{")
        "};")
#+end_src

#+source: myplot
#+begin_src asymptote :noweb yes :file myplot.png
<<stringify(mixed-types)>>
unitsize(3cm);
draw((0,0)--(1,1));
#+end_src

#+results: myplot
[[file:myplot.png]]
----

It may be ugly, but it works.

> I don't think this is misuse in any way.  Consider a table which is a
> result of your research:  the columns are the maker (e.g., "Mazda"), the
> type (e.g., "MX-5"), engine displacement (a number), the mileage/fuel
> consumption (a number), etc., and I want to create some asymptote plot
> from this data.

How would you would you specify it to Asymptote? You can't.

You would probably use:

                string[][] cars={{"Mazda","MX-5","1.5"}};

And that's exactly my point: engine displacement may be a number, but
you would have to enter it as a string.

Though, you insist on being able to enter it as a number anyway, hoping
ob-asymptote will do the magic behind. How could it, since the language
can't itself?

Perhaps there should be a way in Babel (not specifically in Asymptote)
to output a table with raw strings. Because want you really want to use
is:

|"1"|"x"|"5"|
|"3"|"y"|"4"|


Regards,

-- 
Nicolas Goaziou



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