* Math startarray and \cases{xxx} bug?
@ 2005-05-13 14:16 Maurice Diamantini
2005-05-17 15:36 ` sample of using \startarray (long) was: " Maurice Diamantini
0 siblings, 1 reply; 2+ messages in thread
From: Maurice Diamantini @ 2005-05-13 14:16 UTC (permalink / raw)
Cc: Maurice Diamantini
Bonjour à tous,
I'm using amsl module, but it seems there is a probleme
with the startarray/stoparray environment which apear with the "t"
type of column (t for text).
So the basic cases commande doesn't work.
Also the \startcases/stopcases should have the same meaning thas
\cases{xxx} has, but it doen't.
I use textlive distrib with a copy og t-amsl.tex version 2004.11.18
Thank you for any help!
-- Maurice Diamantini
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usemodule[amsl]
\starttext
\startformula
{\bf f(x)} =
\cases{
\sum_{x=1}^n x & if I am false
\\
\displaystyle% just to see the difference
\sum_{x=1}^n x^2 & \text{if I am true}
}
\stopformula
% This formala works as expected, but if I replace
% the forth column of type "l" which contains some \text{xxx} stuffs
% with a column of type "t" without using the \text command,
% there is an error.
\startformula
{\bf e_u(t)} =
\left\{
\startarray{dlll}% ou bien : \startarray{| d | l | r | l}
\displaystyle
\sum_{x=1}^n f(x)
& = ax^2 + b.x + c,
& = a
& \text{Here some text}
\\
\hfil y_2 % just to center stuff within a "d" column
& = 3ax^3 + 3ax^2 + b.x + c,
& = b
&
\\
\sum_{x=1}^n h(x)
& = y_2,
& = a + b
& \text{encore du $(x^2)$ texte}
\stoparray
\right.
\stopformula
\startformula
{\bf e_u(t)} =
\startcases
\sum_{x=1}^n f(x)
& if I am true
\\
\displaystyle
\sum_{x=1}^n h(x)
& if I am false
\stopcases
\stopformula
\stoptext
^ permalink raw reply [flat|nested] 2+ messages in thread
* sample of using \startarray (long) was: Math startarray and \cases{xxx} bug?
2005-05-13 14:16 Math startarray and \cases{xxx} bug? Maurice Diamantini
@ 2005-05-17 15:36 ` Maurice Diamantini
0 siblings, 0 replies; 2+ messages in thread
From: Maurice Diamantini @ 2005-05-17 15:36 UTC (permalink / raw)
Cc: Maurice Diamantini
Le 13 mai 05 à 16:16, Maurice Diamantini a écrit :
> Bonjour à tous,
>
> I'm using amsl module, but it seems there is a probleme
> with the startarray/stoparray environment which apear with the "t"
> type of column (t for text) and the \\
> So the basic cases commande doesn't work.
Thanks to Otared Kavian, things are OK now ;-)
There are still pb with the behavior of \\ which should be replaced
with \cr, and (variants of) \startcases which are not consistents
with the cases{} tex command.
But here are some samples of way to use \startarray and some \cases{}
The few things I'll try to remember are:
- TeX is your friend (don't think in LaTeX)
e.g. \matrix command is is a core usefull command, \cr instead of
\\, ...
- \startarray could be the more powerfull ConTeXt command about
mathematiques
can be (and is) use to build some other commands
- but this later command seems to not be embedable in another
\startarray command
and lacks of some documentations (exemples on how to ajust
spaces, ...)
Also is there a mean (a wiki page?) where to start building a
collection of
mathematics exemples using ConTeXt ?
- home to print the doc in newmat.tex ?
Cordialement,
-- Maurice Diamantini
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\enableregime[il1]
\useencoding[ffr]
\mainlanguage[fr]
\setuppapersize[A4]
\setuplayout[%
topspace=1.0cm,
backspace=2.0cm,
% header=2.0cm,
% footer=1.0cm,
% margin=1.2cm,
% margindistance=3mm, % defaut = 5mm
width=middle,
height=middle%
]
\usemodule[amsl]
% \usemodule[nath]
\starttext
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Utilisation de startarray/stoparray (t-amsl.tex version 2004.11.18)
%
% DECONSELLE !
% \startarray{xx...} ou { | x | x | ... |}
% aaa & bbb & ccc \\
% aaa & bbb & ccc \\
% aaa & bbb & ccc
% \stoparray
%
% CONSEILLE
% \startarray{xx...} ou { | x | x | ... |}
% aaa & bbb & ccc \cr
% aaa & bbb & ccc \cr
% aaa & bbb & ccc \cr
% \stoparray
%
% Le prÈambule {xxx...} :
% ----------------------
% lrc = left, right, center
% d => left avec \displaymath
% t => left en texte (dans \text{...})
% On peut compenser l'effet de l ou r par \hfil
% ou inverser cet effet par \hfill
%
% Les variantes de cases utilisent un array prÈcÈdÈs d'une accolade
%
% \startcases utilise startarray{ll}
% \startbigcases utilise startarray{dl}
% mais
% \cases{...} utilise startarray{lt}
%
% BUG de array ?
% le caractere t (text) semble ne pas fonctionner !
% NON, mais il faut utiliser \cr au lieu de \\ en fin de ligne
% et ne pas oublier le dernier \cp de la dernËre ligne !!
%
\section{Example of \type{\case} with or without \type{\displaystyle}}
\subsection{Without \type{\displaystyle}}
\startbuffer
\startformula
{\bf f(x)} =
\cases{
\sum_{x=1}^n x & if I am true \cr
\sum_{x=1}^n y & \quad if I am false \cr
0 & \quad if I don't know \cr
}
\stopformula
\stopbuffer
\getbuffer
\typebuffer
\subsection{With \type{\displaystyle}}
\startbuffer
\startformula
{\bf f(x)} =
\cases{
\displaystyle
\sum_{x=1}^n x & if I am true \cr
\displaystyle
\sum_{x=1}^n y & \quad if I am false \cr
\displaystyle
0 & \quad if I don't know \cr
}
\stopformula
\stopbuffer
\getbuffer
\typebuffer
\page
\section{Example of \type{\startbigcases} with or without strut}
\subsection{Using \type{\startbigcases}}
Note the needed of \type{\text} as \type{\startbigcases} behavior
isn't the sames as \type{\cases}.
\startbuffer
\startformula
{\bf f(x)} =
\startbigcases
\sum_{x=1}^n x & \quad\text{if I am true} \cr
\sum_{x=0}^n y & \quad\text{if I don't know} \cr
0 & \quad\text{if I am false} \cr
\stopbigcases
\stopformula
\stopbuffer
\getbuffer
\typebuffer
\subsection{Adding \type{\strut} to make the vertical spacing better}
Note the needed of \type{\text} as \type{\startbigcases} behavior
isn't the sames as \type{\cases}.
\startbuffer
\def\STR{\vrule height3.5ex depth1ex width0pt}
\startformula
{\bf f(x)} =
\startbigcases
\sum_{x=1}^n x & if I am true \cr
\sum_{x=0}^n y & \quad\text{if I don't know} \cr
\STR 0 & \text{if I am false} \cr
\stopbigcases
\stopformula
\stopbuffer
\getbuffer
\typebuffer
\page
\section{Standard use of \type{\startarray}}
% \setuptyping[style=\small] % give bad results ! (no more typing font)
\startbuffer
\startformula
{\bf e_u(t)} =
\left\{
\startarray{dllt}% ou bien : \startarray{| d | l | r | l}
\sum_{x=1}^n f(x)
& = ax^2 + b.x + c
& = a
& \quad here some text
\cr
y^2 + z
& = 3ax^3 + 3ax^2 + b.x + c
& = \hfill b
&
\cr
h(x)
& = \hfil y_i
& = a + b
& \quad encore du $(x^2)$ texte
\cr
\stoparray
\right.
\stopformula
\stopbuffer
\getbuffer
\typebuffer
\page
\section{Combining arrays}
Array inside array doesn't seem to work. On should use \type{matrix}
from \TeX{} for this purpose.
\startbuffer
\def\TMPSTRUT{{\vrule height3ex depth2ex width0pt}}
\def\TMP{{
\left|
\matrix{
\tx p_u(t) \in {\cal P}_u \hfill \cr
\tx u \in U \hfill \cr
}
\right.%|
}}
\startformula
{\bf e_u(t)} =
\left\{
\startarray{dllt}
\sum_{\TMP}^n f(x)
& = ax^2 + b.x + c
& = a
& \quad here some text
\cr\TMPSTRUT
y^2 + z
& = 3ax^3 + 3ax^2 + b.x + c
& = \hfill b
&
\cr\TMPSTRUT
h(x)
& = \hfil y_i
& = a + b
& \quad encore du $(x^2)$ texte
\cr
\stoparray
\right.
\stopformula
\stopbuffer
\getbuffer
\typebuffer
\stoptext
%%%%%%%%%%%%%%%%%%%%%%
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2005-05-13 14:16 Math startarray and \cases{xxx} bug? Maurice Diamantini
2005-05-17 15:36 ` sample of using \startarray (long) was: " Maurice Diamantini
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