gmane.editors.texmacs.devel

Re: Tensor indices

2013-05-21T14:57:44

Yes, probably. Thanks, I'll try.

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Re: Tensor indices

François Poulain — 2013-05-21T14:54:16

Le Tue, 21 May 2013 21:02:09 +0700 (NOVT),
A.G.Grozin< at >inp.nsk.su a écrit :


So, if I correctly understand, you should combinate <phantom> and
<superpose>.

An other approach may be via <resize>.

François

Re: Tensor indices

2013-05-21T14:02:09

Yes, I thought about it (more exactly, hphantom). But I still can find no 
complete solution. The problem is fillowing. I have 2 indices, x (upper) 
and y (lower), under each other; I want them to occupy exactly equal 
horizontal space. Suppose, for example, x is wider. Than I want y at the 
bottom to occupy the x width (say, left justified; this is not crucial).

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Re: Tensor indices

François Poulain — 2013-05-21T13:43:26

Le Mon, 20 May 2013 18:05:25 +0700 (NOVT),
A.G.Grozin< at >inp.nsk.su a écrit :


This is because you don't use TeXmacs-trees but s-trees in your code.
Manipulating s-trees ignore cursors and selection stuff.

You may learn about TeXmacs-trees in Help -> Scheme extensions ->
Programming routines for editing documents.

François

Re: Tensor indices

François Poulain — 2013-05-21T13:39:31

Le Mon, 20 May 2013 18:05:25 +0700 (NOVT),
A.G.Grozin< at >inp.nsk.su a écrit :


Maybe <phantom| ... > can help you.

François

Re: Tensor indices

François Poulain — 2013-05-21T09:42:25

Andrey,

Le Mon, 20 May 2013 16:26:23 +0700 (NOVT),
grozin< at >gentoo.org a écrit :


I have the following snippet :

1) Inside TeXmacs :
<assign|my-macro|<xmacro|args|<extern|my-func|<quote-arg|args>>>>

2) In Scheme :
(tm-define (my-func t)
  (:secure #t)
  ; here t is a "TeXmacs tree" and not an stree.
  ; ...
)

François

Tensor indices

2013-05-20T09:26:23

Hello *,

In tensor calculus (as used in general relativity and in other areas of 
physics) tensors with many upper and lower indices are often used. Their 
order is important even if some indices are upper and some lower: a tensor 
can have, say, the first index upper, the second one lower, the third 
upper, etc. As an exception, if a tensor is symmetric in a pair of 
adjacent indices, and one of them is upper and the other one is lower, 
they are traditionally written with the indices on top of each other (a 
typical example is the Kronecker \delta_\mu^\nu - it is easy to write in 
TeXmacs).

So, i've written the following the following scheme function:

(tm-define (tensor . args)
    (define (process-args l u d)
      (if (null? l)
          `(concat (rsup ,(apply tmconcat (reverse u)))
                   (rsub ,(apply tmconcat (reverse d))))
          (let ((x (tree->stree (car l))))
            (cond ((== (car x) 'rsup)
                   (process-args (cdr l) (cons (cadr x) u) (cons `(hphantom ,(cadr x

Re: TeXmacs Sympy plugin LaTeX Output Issue Solved

Bill Eaton — 2013-05-20T19:38:00

Aha! So you have figured out how to get LaTeX output. Brilliant. Your file
also explains why the old plugin from the SymPy github site doesn't work: it
doesn't format the data correctly.

This is probably documented somewhere, but I haven't run across it yet. But
it seems there are at least three directives you can supply TeXmacs with
when you are outputting from a session:

   verbatim:<string>       TeXmacs will display <string> as is
   ps:<string>             TeXmacs will consider <string> to be PostScript 
                           and render accordingly
   latex:<string>          TeXmacs will render <string> as LaTeX

Now that you know how to get LaTeX output working with SymPy, the question
probably becomes how to modify the Python/SymPy plugins going forward. It is
arguably true that:
  not all python users are sympy users
  all sympy users are python users
So the SymPy plugin would want to inherit and possibly extend features from
the Python plugin. And straight Python users would not want any of t

Re: inline plots

Bill Eaton — 2013-05-20T14:13:10

I gave my function a try, but what I get is the PostScript text (and not 
the image) printed on the screen. And I think this is because you need 
to intercept the ps_out command that gets sent to Octave/Texcmacs. You 
need to make sure you can control what comes back from Octave to Texmacs.

--Bill


On 05/17/2013 07:04 PM, David E. Miller wrote:

Re: questions about sessions -- The session prompt issue

David E. Miller — 2013-05-19T15:39:09

Andrey:

I looked into this once. This Is what I found -- I think:

It appears that TeXmacs takes the prompt automatically from the session 
name in one of the Scheme plugin init files, or if not, from some other 
source by default.

However, it appears you can modify this behavior. Look in the example 
plugin folder. I am not sure which OS you are using so you will have to 
find this folder on your system. It should be in a folder named plugins 
but not in the one with the bin folder that has all the tm_* plugin 
files. It is the plugin folder with all the Scheme plugin code. In the 
example folder there is a folder with prompt cpp source code and a 
makefile. You can edit the cpp code and use the makefile to compile a 
binary. This binary file has be located in your plugin folder in the bin 
folder.  I think that TeXmacs looks for this file when the plugin 
session is started and if it exists, the prompt of this binary file  is 
executed and the default plugin prompt is not used.

You will also have to edi

macros with variable number of arguments?

2013-05-19T14:17:20

Hello *,

Suppose I have

(tm-define (name . args) <body>)

This seems OK. But how can I use it from the editor? In the preamble I can 
set

<assign|name|<macro|name|arg|<extern|name|<arg|arg>>>>

for 1 argument. Then I can call the scheme function with 1 argument (this 
works). But how can I do the same for any number of arguments?

Andrey

questions about sessions

2013-05-19T11:26:03

Hello *,

A few stupid questions, sorry.

1. Many plugins have files
.../plugins/foo/packages/session/foo.ts
which define foo-prompt, foo-input, foo-output (or a subset thereof). I 
suppose this foo.ts is automatically loaded when starting a foo session, 
right? Are these macros somehow used automatically by the session?

I experimented a bit and found that, if I define a foo-prompt macro, I can 
use it via

[02]prompt#[02]scheme:(foo-prompt "my_prompt")[05][05]

(in pnambic notation; [02] and [05] are DATA_BEGIN and DATA_END).
Is there a simpler way?

2. In most plugins, definitions of foo-input and foo-output contain 
generic-input and generic-output. What are they?

3. What foo-input (having 2 parameters: prompt and body) is supposed to 
do?

What I want is to do minimal modification to foo CAS, so that instead of
<prompt>
it prints
<prompt_prefix> <prompt> <prompt_suffix>
(where, of course, <prompt_prefix> contains [02] and other stuff, and 
<prompt_suffix> contains [05]). These prefix and suffix should

Re: pnambic plugin

2013-05-19T07:23:41

Sorry, answering to myself:

texmacs --delete-plugin-cache

Andrey

pnambic plugin

2013-05-19T07:05:53

Hello *,

I cannot start the pnambic plugin in TeXmacs-1.0.7.19: it is not in the 
Insert ->  Session menu, though I added ~/.TeXmacs/plugins/pnambic/bin to 
my $PATH:

grozin< at >dns ~ $ which pnambic
/home/grozin/.TeXmacs/plugins/pnambic/bin/pnambic

~/.TeXmacs/plugins/pnambic/progs/init-pnambic.scm says:

(plugin-configure pnambic
   (:require (url-exists-in-path? "pnambic"))
   (:launch "pnambic ~/.TeXmacs/plugins/pnambic/in ~/.TeXmacs/plugins/pnambic/out")
   (:session "Pnambic"))

Has something changed recently in the rules for foo-configure?
(url-exists-in-path? "pnambic") returns #t, as it should.

Andrey

Re: inline plots

David E. Miller — 2013-05-18T02:04:52

Bill:

Try putting your code in an .m file and then start a TeXmacs Octave 
session. Load the .m file using the Octave session command line. You may 
have to change the active directory to where your .m file and EPS file 
are located on you system.

Then try your code on some EPS file of interest.

If you can get this to work, then it may merely be a matter of finding 
the best way to load this file automatically when the Octave plugin code 
is executed when the session is started. This should be the easier part. 
Getting the code right for the EPS file to insert inline is the harder part.

David Miller

On 5/17/2013 5:40 PM, Bill Eaton wrote:

inline plots

Bill Eaton — 2013-05-17T21:40:00

I've already posted this to the Users mailing list. Someone suggested I
cross post here. 

I'd like to solicit suggestions on how to do inline plots in various 
sessions. I've already figured out how to do it in one session and it 
doesn't look impossible for others.

I know this is topic comes up often, but I have found few solutions. If 
you want to have a live mathematical scratchpad or notebook, its 
desirable to have live inline figures. If you're using the Maxima, 
Python,  Octave, etc. plugin, you could invoke an extra command to 
insert an inline plot.

In fact, this is already possible in the Python plugin, via the ps_out 
function. This ps_out function points the way how we might do it in 
other environments.  Heck, maybe it's already possible in other 
environments but I just don't know how. In Python, here's a minimal example:
    import matplotlib
    matplotlib.use('ps')
    from pylab import *
    fig = figure(figsize=(3,2))
    ax=fig.add_subplot(111)
    ax.plot([1,2,3])
    ax.set_title('in

Re: Fwd: Re: Fwd: Re: Mathematica Plugin

BB — 2013-05-17T20:39:54

New Packages Mathematica ( v.6 to 8 ) for TeXmacs 1.0.7.19  ( still on 
this site <http://yuktibhasa.wordpress.com/> ).

New features : 1)  Modification due to a recent small change in the 
TeXmacs's way of re-loading  the files ( described here 
<http://lists.gnu.org/archive/html/texmacs-dev/2013-04/msg00004.html> ).
                        2) Ability to exchange ( input & output ) tables 
of numerical data with GeoGebra.
                        3) (experimental) Mathematica-installer of the 
plugin and of the Mathematica Packages ( only for the Qt-based version 
of TeXmacs under MacOS-X )

best,
bertrand
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Re: defunct user support list?

Miguel de Benito Delgado — 2013-05-13T14:19:51

This was a transitory problem which seems to have been recently fixed.

--
Miguel de  Benito.


On Sat, May 11, 2013 at 9:06 PM, Szabolcs Horvát <szhorvat< at >gmail.com> wrote:

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defunct user support list?

Szabolcs Horvát — 2013-05-11T19:06:17

Hello,

Is there a working TeXmacs user support mailing list?  The one here is
inaccessible:

http://www.texmacs.org/tmweb/home/ml.en.html

(The page has been givin 500 Internal Server Error since I found it)

The TeXmacs website also seems to be in disrepair, with several broken
links and missing images (e.g. none of the keyboard shortcuts are shown
correctly here: http://www.texmacs.org/tmweb/help/faq.en.html , the links
are broken here:
http://www.texmacs.org/tmweb/manual/webman-config.en.html).  I'm
wondering if the TeXmacs project is still alive and maintained.
 With the broken documentation and defunct mailing list it's rather
difficult for a new user to get up to speed with TeXmacs (even though I'd
love to, and trying to use it).

Greetings,
Szabolcs
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Re: a plugin for Mathics ?

David E. Miller — 2013-04-25T03:54:43

Hi Bertrand:

The Mathics project you reference from the viewpoint of a quick look at 
the documentation of the website is very interesting and definitely has 
some potential for a TeXmacs plugin. This project has a way to go to 
reach the level of development and support of say Maxima as a computer 
algebra (symbolic math) system. The best part of this project is that it 
is based on Python which promises some interesting and powerful 
possibilities.

The TeXmacs Python plugin has worked well for me even when loading and 
using modules that should it seems should reveal obvious defects in the 
plugin if there are any. I have not found any so far. I have used it 
with SciPy, NumPy, Scientific Python, Oct2Py, matplotlib, etc. In order 
to use Mathics via a TeXmacs plugin the so-called console version of the 
executable (mathics) command will almost certainly have to be used. I 
recommend that you look to see first if this "executable" is merely a 
shell or Python script file. If so it may be possible to merel

a plugin for Mathics ?

BB — 2013-04-19T21:39:23

Hello,

I recently discovered the project Mathics <http://www.mathics.org/> of  
Jan Pöschko,  which could be interesting as an open-source substitute of 
mathematica.
Do you think it could be interesting/possible to develop a Texmacs 
plugin for this application ?

best,
bertrand
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