Math align question

Math align question

[WN]

Hi,

Is there a way to increase the distance between the columns in 
startalign/stopalign ?
I read the Myway on math align and there are examples where one can set 
the distance but
only for pairs of equations.

In the following code I have 3 columns but they are too close together 
and I want to spread them out.
I tried to use the distance parameter but this setting is ignored. I 
also experimented with the startmatrix/stopmatrix
but I need the sub formula numbering.
Any help appreciated

Wim


\def\ms{\,}
\starttext
\placesubformula
\startformula
\startalign[n=3]
\NC f(x) \NC = \frac{1}{2\pi} \int\limits_{-\infty}^{+\infty} g(y) \ms 
e^{i y x} \ms dy \NC (x \in \reals) \NR[calcb-chapter4-eqn5:i][i]
\NC g(y) \NC = \int\limits_{-\infty}^{+\infty} f(x) \ms e^{-i y x} d x 
\NC ( y \in \reals) \NR[calcb-chapter4-eqn5:ii][ii]
\NC \int\limits_{-\infty}^{+\infty} |f(x)|^{2} dx \NC =  \frac{1}{2\pi} 
\int\limits_{-\infty}^{+\infty} \Big| g(y) \Big|^{2} \ms d y \NC \quad  
\NR[calcb-chapter4-eqn5:iii][iii]
\stopalign
\stopformula
\stoptext
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Re: Math align question

[Aditya Mahajan]

On Sat, 25 Aug 2007, WN wrote:

> Hi,
>
> Is there a way to increase the distance between the columns in
> startalign/stopalign ?
> I read the Myway on math align and there are examples where one can set
> the distance but
> only for pairs of equations.
>
> In the following code I have 3 columns but they are too close together
> and I want to spread them out.

How about

   \startalign[n=2,m=2,distance=2em]


Aditya
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___________________________________________________________________________________

Re: Math align question

[WN]

Aditya,

This confuses me, I thought when using 3 columns I have to set n=3 
otherwise I get errors about extra tab found etc.
However doing as you suggested, seems to work.

Then another question, the formula numbering is not aligned with the 
other formula's in my text
like in the code below. How can I force the sub formula numbering to be 
right aligned ?

Thanks
Wim

\def\ms{\,}
\starttext

\placeformula[calcb-chapter4-eqn2]
\startformula
f(x) = \sum_{n = - \infty}^{+\infty} c_{n} e^{\displaystyle i n \frac{\pi}{L} x} \quad \text{,} \quad c_{n} = \frac{1}{2L} \int\limits_{-L}^{L} f(x) \ms e^{- \displaystyle in\frac{\pi}{L} x } dx
\stopformula

Formula number is not right aligned with the previous formula
\placesubformula
\startformula
\startalign[n=2,m=2,distance=2em]
%\startalign[n=3]
\NC f(x) \NC = \frac{1}{2\pi} \int\limits_{-\infty}^{+\infty} g(y) \ms 
e^{i y x} \ms dy \NC (x \in \reals) \NR[calcb-chapter4-eqn5:i][i]
\NC g(y) \NC = \int\limits_{-\infty}^{+\infty} f(x) \ms e^{-i y x} d x 
\NC ( y \in \reals) \NR[calcb-chapter4-eqn5:ii][ii]
\NC \int\limits_{-\infty}^{+\infty} |f(x)|^{2} dx \NC =  \frac{1}{2\pi} 
\int\limits_{-\infty}^{+\infty} \Big| g(y) \Big|^{2} \ms d y \NC \quad  
\NR[calcb-chapter4-eqn5:iii][iii]
\stopalign
\stopformula
\stoptext


> How about
>
>    \startalign[n=2,m=2,distance=2em]
>
>
> Aditya
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>
>   

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

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___________________________________________________________________________________

Re: Math align question

[Aditya Mahajan]

On Sun, 26 Aug 2007, WN wrote:

> Aditya,
>
> This confuses me, I thought when using 3 columns I have to set n=3 otherwise 
> I get errors about extra tab found etc.
> However doing as you suggested, seems to work.

This is due to the m key. m=2 tells context that there are two blocks
of equations. n=2 says that each block has two columns. So, in all 
there should be n*m = 4 \NC in the equation (I had only put three, 
which led to the wrong equation number alignment).

> Then another question, the formula numbering is not aligned with the other 
> formula's in my text
> like in the code below. How can I force the sub formula numbering to be right 
> aligned ?

See above: This was due to mistake in my code. This works. (Though it 
will be nice if such mistakes do not cause these kinds of errors)

\def\ms{\,}
\starttext

\placeformula[calcb-chapter4-eqn2]
\startformula
f(x) = \sum_{n = - \infty}^{+\infty} c_{n} e^{\displaystyle i n
\frac{\pi}{L} x} \quad \text{,} \quad c_{n} = \frac{1}{2L}
\int\limits_{-L}^{L} f(x) \ms e^{- \displaystyle in\frac{\pi}{L} x } 
dx
\stopformula

Formula number is not right aligned with the previous formula
\placesubformula
\startformula
\startalign[n=2,m=2,distance=2em]
%\startalign[n=3]
\NC f(x) \NC = \frac{1}{2\pi} \int\limits_{-\infty}^{+\infty} g(y) \ms
e^{i y x} \ms dy \NC\NC (x \in \reals) \NR[calcb-chapter4-eqn5:i][i]
\NC g(y) \NC = \int\limits_{-\infty}^{+\infty} f(x) \ms e^{-i y x} d x
\NC\NC ( y \in \reals) \NR[calcb-chapter4-eqn5:ii][ii]
\NC \int\limits_{-\infty}^{+\infty} |f(x)|^{2} dx \NC = 
\frac{1}{2\pi}
\int\limits_{-\infty}^{+\infty} \Big| g(y) \Big|^{2} \ms d y \NC\NC
\quad
\NR[calcb-chapter4-eqn5:iii][iii]
\stopalign
\stopformula
\stoptext


Do you know about subformulas? For example,

\setupsubformulas[conversion=romannumerals]
\def\ms{\,}

\starttext

\startsubformulas[calcb-chapter-4-eqn5]
   \placeformula
   \startformula \startalign[n=2,m=2,distance=2em]
       \NC f(x) \EQ \frac{1}{2\pi} \int\limits_{-\infty}^{+\infty} g(y) \ms
           e^{i y x} \ms dy
       \NC\NC (x \in \reals)
           \NR[calcb-chapter4-eqn5:i]
       \NC g(y) \EQ \int\limits_{-\infty}^{+\infty} f(x) \ms e^{-i y x} d x
       \NC\NC ( y \in \reals)
           \NR[calcb-chapter4-eqn5:ii]
       \NC \int\limits_{-\infty}^{+\infty} |f(x)|^{2} dx
       \EQ \frac{1}{2\pi} \int\limits_{-\infty}^{+\infty}
           \Big| g(y) \Big|^{2} \ms d y
       \NC\NC
           \NR[calcb-chapter4-eqn5:iii]
   \stopalign \stopformula
\stopsubformulas

You can also refer to the whole equation~\in[calcb-chapter-4-eqn5], or 
an individual number~\in[calcb-chapter4-eqn5:iii].

\stoptext

BTW, why no \ms before dx, and a \ms before dy?

Aditya



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