* [OT] intelligent commas in math (in LaTeX)
@ 2011-09-26 20:06 Mojca Miklavec
2011-09-29 16:15 ` Aditya Mahajan
0 siblings, 1 reply; 6+ messages in thread
From: Mojca Miklavec @ 2011-09-26 20:06 UTC (permalink / raw)
To: mailing list for ConTeXt users
http://tug.org/pracjourn/2011-1/beccari.html
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* Re: [OT] intelligent commas in math (in LaTeX)
2011-09-26 20:06 [OT] intelligent commas in math (in LaTeX) Mojca Miklavec
@ 2011-09-29 16:15 ` Aditya Mahajan
2011-09-30 7:36 ` luigi scarso
0 siblings, 1 reply; 6+ messages in thread
From: Aditya Mahajan @ 2011-09-29 16:15 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Mon, 26 Sep 2011, Mojca Miklavec wrote:
> http://tug.org/pracjourn/2011-1/beccari.html
Short summary: This allows the comma in $1, 2, 3$ to be have as
punctuation comma (similar to \setupmathematics[autopunct=no]) and
$1,23$ to behave as decimal comma (similar to
\setupmatematics[autopunct=yes]). Since it is targeting pdftex and xetex
engines, it makes , an active char in mathmode and redefines it as a macro
that uses look ahead to check if the next token is a digit.
In principle a cleaner implementation is possible in luatex (without using
active characters), but I am not completely sure about this. It will be
better to handle this as part of \mnum macro.
Aditya
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* Re: [OT] intelligent commas in math (in LaTeX)
2011-09-29 16:15 ` Aditya Mahajan
@ 2011-09-30 7:36 ` luigi scarso
2011-09-30 9:04 ` Philipp A.
2011-10-01 2:12 ` Aditya Mahajan
0 siblings, 2 replies; 6+ messages in thread
From: luigi scarso @ 2011-09-30 7:36 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Thu, Sep 29, 2011 at 6:15 PM, Aditya Mahajan <adityam@umich.edu> wrote:
> On Mon, 26 Sep 2011, Mojca Miklavec wrote:
>
>> http://tug.org/pracjourn/2011-1/beccari.html
>
> Short summary: This allows the comma in $1, 2, 3$ to be have as punctuation
> comma (similar to \setupmathematics[autopunct=no]) and
> $1,23$ to behave as decimal comma (similar to
> \setupmatematics[autopunct=yes]). Since it is targeting pdftex and xetex
> engines, it makes , an active char in mathmode and redefines it as a macro
> that uses look ahead to check if the next token is a digit.
>
> In principle a cleaner implementation is possible in luatex (without using
> active characters), but I am not completely sure about this. It will be
> better to handle this as part of \mnum macro.
>
> Aditya
Hm, can you explain this a bit ?
--
luigi
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* Re: [OT] intelligent commas in math (in LaTeX)
2011-09-30 7:36 ` luigi scarso
@ 2011-09-30 9:04 ` Philipp A.
2011-10-01 2:12 ` Aditya Mahajan
1 sibling, 0 replies; 6+ messages in thread
From: Philipp A. @ 2011-09-30 9:04 UTC (permalink / raw)
To: mailing list for ConTeXt users
[-- Attachment #1.1: Type: text/plain, Size: 94 bytes --]
that would be very useful for sets and german decimals: $x = 1,33$ vs. $x ∈
{1, 2, 3, 4}$
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* Re: [OT] intelligent commas in math (in LaTeX)
2011-09-30 7:36 ` luigi scarso
2011-09-30 9:04 ` Philipp A.
@ 2011-10-01 2:12 ` Aditya Mahajan
2011-10-01 6:16 ` luigi scarso
1 sibling, 1 reply; 6+ messages in thread
From: Aditya Mahajan @ 2011-10-01 2:12 UTC (permalink / raw)
To: mailing list for ConTeXt users
[-- Attachment #1: Type: TEXT/PLAIN, Size: 2005 bytes --]
>> In principle a cleaner implementation is possible in luatex (without using
>> active characters), but I am not completely sure about this. It will be
>> better to handle this as part of \mnum macro.
>>
> Hm, can you explain this a bit ?
Currently ConTeXt already checks if '.' is part of a complete number or
not as part of the export macros. For example:
\m{x + 1.25y = 3.5}
exports as
<m:math
display="inline"><m:mrow><m:mi>𝑥</m:mi><m:mo>+</m:mo><m:mn>1.25</m:mn><m:mi>𝑦</m:mi><m:mo>=</m:mo><m:mn>3.5</m:mn></m:mrow></m:math>
Notice that 1.25 is part of a single <m:mn> tag.
In contrast, if you use comma as a math delimiter, then the export
function does not recognize the number correctly.
\m{x + 1,25y = 3.5}
exports as
<m:math
display="inline"><m:mrow><m:mi>𝑥</m:mi><m:mo>+</m:mo><m:mn>1</m:mn><m:mo>,</m:mo><m:mn>25</m:mn><m:mi>𝑦</m:mi><m:mo>=</m:mo><m:mn>3</m:mn><m:mo>,</m:mo><m:mn>5</m:mn></m:mrow></m:math>
However, we do have a \mn macro (math number) to tag numbers. So you can
type
\m{x + \mn{1,25}y = \mn{3,5}}
which exports as
<m:math
display="inline"><m:mrow><m:mi>𝑥</m:mi><m:mo>+</m:mo><m:mn>1,25</m:mn><m:mi>𝑦</m:mi><m:mo>=</m:mo><m:mn>3,5</m:mn></m:mrow></m:math>
So, if we want to recognize ',' as a decimal separator, two solutions are
possible in MkIV. The first is to build upon the existing export code that
recognizes '.' as a decimal separator (to figure out the contents of the
<mn> tag) to also recognize ',' as a decimal separator;
The drawback of such an approach is that if you are in the habit of not
adding a space after a comma, for example writing "Let $\naturalnumbers$
denote the set $\{1,2,3,\dots\}$ of natural numbers..." then you will get
wrong output.
So, an alternative option is to ask the user to tag all numbers with \mn.
Then, the \mn{...} macro can redefine the comma so that the spaces around
it match its use as a decimal separator.
Aditya
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* Re: [OT] intelligent commas in math (in LaTeX)
2011-10-01 2:12 ` Aditya Mahajan
@ 2011-10-01 6:16 ` luigi scarso
0 siblings, 0 replies; 6+ messages in thread
From: luigi scarso @ 2011-10-01 6:16 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Sat, Oct 1, 2011 at 4:12 AM, Aditya Mahajan <adityam@umich.edu> wrote:
>>> In principle a cleaner implementation is possible in luatex (without
>>> using
>>> active characters), but I am not completely sure about this. It will be
>>> better to handle this as part of \mnum macro.
>>>
>> Hm, can you explain this a bit ?
>
> Currently ConTeXt already checks if '.' is part of a complete number or not
> as part of the export macros. For example:
>
> \m{x + 1.25y = 3.5}
>
> exports as
>
> <m:math
> display="inline"><m:mrow><m:mi>𝑥</m:mi><m:mo>+</m:mo><m:mn>1.25</m:mn><m:mi>𝑦</m:mi><m:mo>=</m:mo><m:mn>3.5</m:mn></m:mrow></m:math>
>
> Notice that 1.25 is part of a single <m:mn> tag.
>
> In contrast, if you use comma as a math delimiter, then the export function
> does not recognize the number correctly.
>
> \m{x + 1,25y = 3.5}
>
> exports as
>
> <m:math
> display="inline"><m:mrow><m:mi>𝑥</m:mi><m:mo>+</m:mo><m:mn>1</m:mn><m:mo>,</m:mo><m:mn>25</m:mn><m:mi>𝑦</m:mi><m:mo>=</m:mo><m:mn>3</m:mn><m:mo>,</m:mo><m:mn>5</m:mn></m:mrow></m:math>
>
> However, we do have a \mn macro (math number) to tag numbers. So you can
> type
>
> \m{x + \mn{1,25}y = \mn{3,5}}
>
> which exports as
>
> <m:math
> display="inline"><m:mrow><m:mi>𝑥</m:mi><m:mo>+</m:mo><m:mn>1,25</m:mn><m:mi>𝑦</m:mi><m:mo>=</m:mo><m:mn>3,5</m:mn></m:mrow></m:math>
>
>
> So, if we want to recognize ',' as a decimal separator, two solutions are
> possible in MkIV. The first is to build upon the existing export code that
> recognizes '.' as a decimal separator (to figure out the contents of the
> <mn> tag) to also recognize ',' as a decimal separator;
>
> The drawback of such an approach is that if you are in the habit of not
> adding a space after a comma, for example writing "Let $\naturalnumbers$
> denote the set $\{1,2,3,\dots\}$ of natural numbers..." then you will get
> wrong output.
>
> So, an alternative option is to ask the user to tag all numbers with \mn.
> Then, the \mn{...} macro can redefine the comma so that the spaces around it
> match its use as a decimal separator.
>
> Aditya
ok
--
luigi
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2011-09-26 20:06 [OT] intelligent commas in math (in LaTeX) Mojca Miklavec
2011-09-29 16:15 ` Aditya Mahajan
2011-09-30 7:36 ` luigi scarso
2011-09-30 9:04 ` Philipp A.
2011-10-01 2:12 ` Aditya Mahajan
2011-10-01 6:16 ` luigi scarso
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