using headnumber

using headnumber

[Thomas A. Schmitz]

Hi,

I have a counter which I want to be incremented after every \section  
command and reset after every odd \section (don't ask why...). So I  
tried this approach:

\setuphead[section]
    [command={{{\determineheadnumber[section]}
      \ifodd{\currentheadnumber[section]}\resetSlideNumber 
\incrementSlideNumber
      \else\incrementSlideNumber
      \fi}]

But I'm getting errors:

! Missing number, treated as zero.
<to be read again>
                    {
\@@kosectioncommand ...adnumber [section]}\ifodd {
                                                   \currentheadnumber  
[sectio...

\doplaceheadnumbertext ...ue {\??ko #1\c!command }
                                                    
{\dostartattributes {\??ko...

\dodododoconstructhead ...{\finalsectionnumber }}}
                                                   \writesection {#1} 
{#3}{#4}...

Any pointers?

Thomas

Re: using headnumber

[Peter Rolf]

Hi Thomas,

Thomas A. Schmitz wrote:
> Hi,
> 
> I have a counter which I want to be incremented after every \section  
> command and reset after every odd \section (don't ask why...). So I  
> tried this approach:
> 
> \setuphead[section]
>     [command={{{\determineheadnumber[section]}
	       ^^^^
one opening brace too much

If you problem remains, try to add a \expandafter in front of \ifodd.
Sometimes it is also helpful to enclose the number expression by
\numexpr ... \relax (for conversion).

Greets, Peter

>       \ifodd{\currentheadnumber[section]}\resetSlideNumber 
> \incrementSlideNumber
>       \else\incrementSlideNumber
>       \fi}]
> 
> But I'm getting errors:
> 
> ! Missing number, treated as zero.
> <to be read again>
>                     {
> \@@kosectioncommand ...adnumber [section]}\ifodd {
>                                                    \currentheadnumber  
> [sectio...
> 
> \doplaceheadnumbertext ...ue {\??ko #1\c!command }
>                                                     
> {\dostartattributes {\??ko...
> 
> \dodododoconstructhead ...{\finalsectionnumber }}}
>                                                    \writesection {#1} 
> {#3}{#4}...
> 
> Any pointers?
> 
> Thomas
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context
> 
> 

Re: using headnumber

[Thomas A. Schmitz]

Hi Peter,

thanks for the help! The additional { must have been a fluke with   
copy/paste; wasn't in my file. By sheer stubbornness, I tried until I  
found something that works:
     command={{\determineheadnumber[section]}\ifodd\currentheadnumber 
\resetSlideNumber\incrementSlideNumber \else\incrementSlideNumber \fi}]

So after \determineheadnumber[something], \currentheadnumber appears  
to have that value and doesn't take an argument.

Thanks, and best

Thomas

On Apr 20, 2006, at 5:14 PM, Peter Rolf wrote:

> Hi Thomas,
>
> Thomas A. Schmitz wrote:
>> Hi,
>>
>> I have a counter which I want to be incremented after every \section
>> command and reset after every odd \section (don't ask why...). So I
>> tried this approach:
>>
>> \setuphead[section]
>>     [command={{{\determineheadnumber[section]}
> 	       ^^^^
> one opening brace too much
>
> If you problem remains, try to add a \expandafter in front of \ifodd.
> Sometimes it is also helpful to enclose the number expression by
> \numexpr ... \relax (for conversion).
>
> Greets, Peter

Re: using headnumber

[Sanjoy Mahajan]

> So after \determineheadnumber[something], \currentheadnumber appears
> to have that value and doesn't take an argument.

Thanks, that information answers the question I just sent to the list.

-Sanjoy

`Never underestimate the evil of which men of power are capable.'
         --Bertrand Russell, _War Crimes in Vietnam_, chapter 1.

Re: using headnumber

[Hans Hagen]

Thomas A. Schmitz wrote:
> Hi Peter,
>
> thanks for the help! The additional { must have been a fluke with   
> copy/paste; wasn't in my file. By sheer stubbornness, I tried until I  
> found something that works:
>      command={{\determineheadnumber[section]}\ifodd\currentheadnumber 
> \resetSlideNumber\incrementSlideNumber \else\incrementSlideNumber \fi}]
>   

why not directly use the slidenumber

\def\SlideNumber{1}

command={\ifodd\SlideNumber\gdef\SlideNumber{1}\else\doglobal\increment\SlideNumber\fi}}

command={\ifodd\SlideNumber\gdef\SlideNumber{1}\else\gdef\SlideNumber{2}\fi}} 


command={\xdef\SlideNumber{\ifodd\SlideNumber\space1\else2\fi}}

\def\SlideNumber{\ifconditional\OddSlide1\else2\fi}

command=\ifodd\settrue\OddSlide\else\setfalse\OddSlide\fi

etc etc 


> So after \determineheadnumber[something], \currentheadnumber appears  
> to have that value and doesn't take an argument.
>
> Thanks, and best
>
> Thomas
>
> On Apr 20, 2006, at 5:14 PM, Peter Rolf wrote:
>
>   
>> Hi Thomas,
>>
>> Thomas A. Schmitz wrote:
>>     
>>> Hi,
>>>
>>> I have a counter which I want to be incremented after every \section
>>> command and reset after every odd \section (don't ask why...). So I
>>> tried this approach:
>>>
>>> \setuphead[section]
>>>     [command={{{\determineheadnumber[section]}
>>>       
>> 	       ^^^^
>> one opening brace too much
>>
>> If you problem remains, try to add a \expandafter in front of \ifodd.
>> Sometimes it is also helpful to enclose the number expression by
>> \numexpr ... \relax (for conversion).
>>
>> Greets, Peter
>>     
>
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context
>   


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-----------------------------------------------------------------

Re: using headnumber

[Thomas A. Schmitz]

Fascinating, but... The slidenumber needs to be reset according to  
the criterion whether we're starting an odd or an even section.

If anybody's wondering why I want such a bizarre setup: this is  the  
manuscript of my course for the entire term. Every class consists of  
two lectures = two sections in my manuscript, but because the  
lectures are back-to-back, I have one pdf presentation for both and  
want the marks for the slides in my manuscript numbered consecutively  
for section 1+2, then reset and numbered for 3+4 etc. Btw, I  
laboriously wrote my own macro to get nice marks for the slides in my  
manuscripts and  then I discovered the \definelabel command...

Best

Thomas


On Apr 20, 2006, at 10:44 PM, Hans Hagen wrote:

> why not directly use the slidenumber
>
> \def\SlideNumber{1}
>
> command={\ifodd\SlideNumber\gdef\SlideNumber{1}\else\doglobal 
> \increment\SlideNumber\fi}}
>
> command={\ifodd\SlideNumber\gdef\SlideNumber{1}\else\gdef 
> \SlideNumber{2}\fi}}
>
>
> command={\xdef\SlideNumber{\ifodd\SlideNumber\space1\else2\fi}}
>
> \def\SlideNumber{\ifconditional\OddSlide1\else2\fi}
>
> command=\ifodd\settrue\OddSlide\else\setfalse\OddSlide\fi
>
> etc etc

Re: using headnumber

[Sanjoy Mahajan]

> \determineheadnumber[section]

Thanks for mentioning that command, which I'd been looking for.  I
couldn't quite get it to work, but reading the code near its
definition helped me solve another problem.  Each chapter has a
section for exercises, and each exercise is a subsection with a short
title (a few words).  e.g.

  \exercise{Batteries}

  What is the cost of energy from a 9V battery?  From a wall socket (the
  mains)?

I want the exercises to be numbered just by the exercise number
(e.g. 7), not for example 1.6.7 (if the exercises are the 6th section
in chapter 1).  Hence this setup:

  \definehead[exercise][subsection]
  \def\choptwo#1.#2.{}
  \def\processtwo#1{\expandafter\choptwo#1\relax}
  \setuphead[exercise][style=italic, 
  numbercommand={\processtwo{\currentheadnumber} \gobbleoneargument}]

If there's an easier way using \determineheadnumber, I'll be happy to
use it instead but the above probably fragile hack works for me.

The more obvious try

  \def\choptwo#1.#2.{}
  \setuphead[subsection][numbercommand={\expandafter\choptwo}]

produced 200 lines of complaint, starting with:
  ERROR: Argument of \choptwo has an extra }.

In the following minimal example of my attempt to use
determineheadnumber, the subsection numbers are missing (instead of
being the chapter number):

  \setuphead[subsection]
  [numbercommand={\determineheadnumber[chapter] \gobbleoneargument}]
  \starttext
  \chapter{One}
  \section{A1}
  hi
  \subsection{B1}
  hi
  \subsection{B2}
  hi
  \stoptext

>> 
>> \setuphead[section]
>>     [command={{{\determineheadnumber[section]}
	       ^^^^
> one opening brace too much

That's why I want the editor to insert } for me automatically when I
type { (in the earlier thread about AUCTeX/Emacs).

-Sanjoy

`Never underestimate the evil of which men of power are capable.'
         --Bertrand Russell, _War Crimes in Vietnam_, chapter 1.