- From: TeXmacs <address@hidden>
- To: address@hidden
- Subject: Re: about french "tableaux de variation"
- Date: Fri, 12 Nov 2021 00:14:04 +0100
Hi Marc,
Probably an even a better solution would be to automatically generate
the table using a computer algebra system. One day, if I have time...
Best wishes, --Joris
On Thu, Nov 11, 2021 at 11:22:32PM +0100, marc lalaude-labayle wrote:
>
Hi Joris, Vincent and texmacs-users.
>
>
Here is a link to create "tableaux de variations", a french didactical tool
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to study functions :
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http://math.et.info.free.fr/TikZ/TableauxVariations/index.html
>
>
It's pretty convincing when tested with my colleagues.
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>
Best.
>
>
Marc
>
>
Le jeu. 11 nov. 2021 à 23:18, TeXmacs <address@hidden> a
>
écrit :
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>
> Hi Vincent,
>
>
>
> I agree that it would be nice to do something to make this easier.
>
> For the moment, you may also use the picture editor for this.
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> This is a bit less constraint, and less handy for drawing
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> the horizontal and vertical lines of the table.
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> Still, it might sometimes have its advantages: if you want
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> special dotted or double lines, precise control over where
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> you wish to put certain values, etc.
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>
>
> Best wishes, --Joris
>
>
>
>
>
> On Wed, Sep 01, 2021 at 09:20:40AM +0200, vincent douce wrote:
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> > hi
>
> > i am wondering that something simple could be done to make tableaux de
>
> variation easy to build inside TeXmacs
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> > some items related with tabulation are missing for the moment :
>
> >
>
> > an equivalent of esc-esc-tab that would not create a blanck space but an
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> extensible diagonale arrow (right-down ↘︎ and right-up ➚)
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> > an equivalent of esc-esc-tab that would a blanck space with a + or a -
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> at the middle
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> > say, if :
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> > * esc-esc-/ would create and extensible right-up ➚ arrow
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> > * esc-esc-\ would create and extensible right-down ↘︎ arrow
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> > * esc-esc-+ would create and extensible space with a + at the middle
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> > * esc-esc-– would create and extensible space with a - at the middle
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> > then i would create a tableau de variation by making a large bloc with 3
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> lines and, for example for x|->2x^3-3x^2 :
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> > line 1, column 2 : -∞ esc-esc-tab 0 esc-esc-tab 1 esc-esc-tab
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> +∞
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> > line 2, column 2 : esc-esc-+ 0 esc-esc-– 0 esc-esc-+
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> > line 3, column 2 : _-∞ esc-esc-/ ^0 esc-esc-– _-1 esc-esc-+
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> > ^+∞
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> > that remains artisanal, but artisanal is better than impossible
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> >
>
> > what do you think about that ?
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> >
>
> > Vincent
>
>
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