ConTeXt, Charts, and transparency

ConTeXt, Charts, and transparency

[Idris Samawi Hamid]

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Dear fellow gangsters,

2 questions:

QUESTION 1) Does ConTeXt have a graphical charts module, a la flowcharts  
module? If not, are there some examples of graphical charts done in  
ConTeXt anywhere? Please see the attached png for what I have in mind.

I did find a module m-steps, but the enclosed example crashes, so I'm not  
sure if this is what I'm looking for...

=============================
% output=pdf interface=en

\usemodule[m-steps]

% A simple paragraph-flow test:

\starttext

\startbuffer
\startSTEPchart
\cells {A}     {B}
\cells {one}   {five}  \texts{$+2$}{$-2$}
\cells {two}   {four}  \texts{$+3$}{$-3$}
\cells {three} {three} \texts{$+4$}{$-4$}
\cells {four}  {two}   \texts{$+5$}{$-5$}
\cells {five}  {one}
\stopSTEPchart
\stopbuffer

\getbuffer

\startnarrower \getbuffer \stopnarrower

\placefigure[left]{}{} \getbuffer

\stoptext
=============================

log file:

=============================
(chart-test-mpgraph.mp  
(c:\ConTeXt\tex\texmf-local/metapost/context/base/mp-step
.mp)
>> (0.5,0.5,0.5)
>> 2.5
! Not implemented: (color)scaled(known numeric).
<to be read again>
                    ;
pen_size->...epath(top.origin--bot.origin)(TEXT2);
                                                   (ypart.urcorner.p-ypart.lr...
set_ahlength->...:=(ahfactor*pen_size(_op_(TEXT0))
                                                   );
arrowheadonpath->...;set_ahlength(scaled.ahfactor)
                                                   ;arrowhead(EXPR2)if(EXPR3)...
drawline->...R2)=1:draw.arrowheadonpath((EXPR3),1)
                                                   ;elseif(EXPR2)=2:draw.arro...
image->...ture;currentpicture:=nullpicture;(TEXT2)
                                                   ;currentpicture.endgroup
l.145 ...e(2,2), 1.79993pt, (scaledgray(.5,1)) ) )
                                                   ; lines[b][2][2] :=  
image(...
?
=============================

QUESTION 2) Not really a direct context question but is needed for a  
context document: how can I convert the attached pdf to a transparent  
background without loosing the image (bitmap in origin). ImageMagick does  
not work well at all. I need it in a document with a colored background.

Thnx in advance

Best
Idris

-- 
Professor Idris Samawi Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80523

--
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Re: ConTeXt, Charts, and transparency

[Taco Hoekwater]

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Idris Samawi Hamid wrote:
> Dear fellow gangsters,
> 
> 2 questions:
> 
> QUESTION 1) Does ConTeXt have a graphical charts module, a la 
> flowcharts  module? 

Not that I know of (something looking like the png example, I mean).

> QUESTION 2) Not really a direct context question but is needed for a  
> context document: how can I convert the attached pdf to a transparent  
> background without loosing the image (bitmap in origin). ImageMagick 
> does  not work well at all. I need it in a document with a colored 
> background.

See attached. xpdf comes with a command called "pdfimages" that
extracts bitmaps from pdf files. AFAIK, there is also a windows
version. Then I used a font editor to convert the background to
alpha channel in the exported bitmap.

Greetings, taco



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Re: ConTeXt, Charts, and transparency

[Idris Samawi Hamid]

Hi Taco,

Thnx for the png conversion :-)

On Wed, 12 Jul 2006 02:56:46 -0600, Taco Hoekwater <taco@elvenkind.com>  
wrote:

>> QUESTION 1) Does ConTeXt have a graphical charts module, a la
>> flowcharts  module?
>
> Not that I know of (something looking like the png example, I mean).

Ok, are there any suggestions for efficiently doing this kind of thing in  
ConTeXt/MetaPost?

Thnx again
Idris

-- 
Professor Idris Samawi Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80523

--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

Re: ConTeXt, Charts, and transparency

[Idris Samawi Hamid]

Dear syndicate,

So it's not a graphical charts module but I'm curious anyway: Could  
someone explain why the following sample file apparently does not work or  
what I am missing?

:-)

Best
Idris

> =============================
> % output=pdf interface=en
>
> \usemodule[m-steps]
>
> % A simple paragraph-flow test:
>
> \starttext
>
> \startbuffer
> \startSTEPchart
> \cells {A}     {B}
> \cells {one}   {five}  \texts{$+2$}{$-2$}
> \cells {two}   {four}  \texts{$+3$}{$-3$}
> \cells {three} {three} \texts{$+4$}{$-4$}
> \cells {four}  {two}   \texts{$+5$}{$-5$}
> \cells {five}  {one}
> \stopSTEPchart
> \stopbuffer
>
> \getbuffer
>
> \startnarrower \getbuffer \stopnarrower
>
> \placefigure[left]{}{} \getbuffer
>
> \stoptext
> =============================
>
> log file:
>
> =============================
> (chart-test-mpgraph.mp
> (c:\ConTeXt\tex\texmf-local/metapost/context/base/mp-step
> .mp)
>>> (0.5,0.5,0.5)
>>> 2.5
> ! Not implemented: (color)scaled(known numeric).
> <to be read again>
>                     ;
> pen_size->...epath(top.origin--bot.origin)(TEXT2);
>                                                    (ypart.urcorner.p-ypart.lr...
> set_ahlength->...:=(ahfactor*pen_size(_op_(TEXT0))
>                                                    );
> arrowheadonpath->...;set_ahlength(scaled.ahfactor)
>                                                    ;arrowhead(EXPR2)if(EXPR3)...
> drawline->...R2)=1:draw.arrowheadonpath((EXPR3),1)
>                                                    ;elseif(EXPR2)=2:draw.arro...
> image->...ture;currentpicture:=nullpicture;(TEXT2)
>                                                    ;currentpicture.endgroup
> l.145 ...e(2,2), 1.79993pt, (scaledgray(.5,1)) ) )
>                                                    ; lines[b][2][2] :=
> image(...
> ?
> =============================

-- 
Professor Idris Samawi Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80523

--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

Re: ConTeXt, Charts, and transparency

[Taco Hoekwater]

Idris Samawi Hamid wrote:
> Dear syndicate,
> 
> So it's not a graphical charts module but I'm curious anyway: Could  
> someone explain why the following sample file apparently does not work or  
> what I am missing?

FWIW: Doesn't work here either.

Taco

Re: ConTeXt, Charts, and transparency

[Hans Hagen]

Idris Samawi Hamid wrote:
> Dear syndicate,
>
> So it's not a graphical charts module but I'm curious anyway: Could  
> someone explain why the following sample file apparently does not work or  
> what I am missing?
>   
did you look into m-chart (flow charts) 

Hans 

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: ConTeXt, Charts, and transparency

[Hans Hagen]

Taco Hoekwater wrote:
> Idris Samawi Hamid wrote:
>   
>> Dear syndicate,
>>
>> So it's not a graphical charts module but I'm curious anyway: Could  
>> someone explain why the following sample file apparently does not work or  
>> what I am missing?
>>     
>
> FWIW: Doesn't work here either.
>   
can someone send me the test file off-list? 

Hans 

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: ConTeXt, Charts, and transparency

[Idris Samawi Hamid]

On Fri, 14 Jul 2006 09:33:13 -0600, Hans Hagen <pragma@wxs.nl> wrote:

> Idris Samawi Hamid wrote:
>> Dear syndicate,
>>
>> So it's not a graphical charts module but I'm curious anyway: Could
>> someone explain why the following sample file apparently does not work  
>> or
>> what I am missing?
>>
> did you look into m-chart (flow charts)

Yes, but that seems mainly geared towards flow charts, not graphical  
charts. Can m-chart do things like the example png attached at the start  
of the thread?

Best
Idris

-- 
Professor Idris Samawi Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80523

--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

Re: ConTeXt, Charts, and transparency

[Hans Hagen]

The problem is in the arrows ...

\startMPinclusions
def set_ahlength (text t) =
% ahlength := (ahfactor*pen_size(_op_ t)) ; % _op_ added
% problem: _op_ can contain color so a no-go, we could apply the transform
% but i need to figure out the best way (fakepicture and take components).
  ahlength := (ahfactor*pen_size(t)) ;
enddef ;
\stopMPinclusions

Hans


-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: ConTeXt, Charts, and transparency

[Hans Hagen]

Idris Samawi Hamid wrote:
>
> Yes, but that seems mainly geared towards flow charts, not graphical  
> charts. Can m-chart do things like the example png attached at the start  
> of the thread?
>   
i lost that one; actually, willy egger is the most experienced chart user but he's on vacation 

Hans  

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: ConTeXt, Charts, and transparency

[Adam Lindsay]

Hans Hagen wrote:
> Idris Samawi Hamid wrote:
>> Yes, but that seems mainly geared towards flow charts, not graphical  
>> charts. Can m-chart do things like the example png attached at the start  
>> of the thread?
>>   
> i lost that one; actually, willy egger is the most experienced chart user but he's on vacation 

It was more like a bar graph (with two sets of y-values), nothing to do 
with m-charts. I thought about mp-graph stuff, but I don't see how it 
can be (trivially) made to do that visual style.
-- 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  Adam T. Lindsay, Computing Dept.     atl@comp.lancs.ac.uk
  Lancaster University, InfoLab21        +44(0)1524/510.514
  Lancaster, LA1 4WA, UK             Fax:+44(0)1524/510.492
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Re: ConTeXt, Charts, and transparency

[Aditya Mahajan]

On Sat, 15 Jul 2006, Adam Lindsay wrote:

> Hans Hagen wrote:
>> Idris Samawi Hamid wrote:
>>> Yes, but that seems mainly geared towards flow charts, not graphical
>>> charts. Can m-chart do things like the example png attached at the start
>>> of the thread?
>>>
>> i lost that one; actually, willy egger is the most experienced chart user but he's on vacation
>
> It was more like a bar graph (with two sets of y-values), nothing to do
> with m-charts. I thought about mp-graph stuff, but I don't see how it
> can be (trivially) made to do that visual style.

Have a look at http://www-math.univ-poitiers.fr/~phan/statsmac.html to 
see if can modify them to get the visual effect that you want.

Aditya

Re: ConTeXt, Charts, and transparency

[Idris Samawi Hamid]

On Tue, 18 Jul 2006 11:30:31 -0600, Aditya Mahajan <adityam@umich.edu>  
wrote:

> Have a look at http://www-math.univ-poitiers.fr/~phan/statsmac.html to
> see if can modify them to get the visual effect that you want.

Will do: Hans, Aditya, can this be ported to MetaFun or its own m-stats  
module?

Best
Idris

-- 
Professor Idris Samawi Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80523

--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

Re: ConTeXt, Charts, and transparency

[Aditya Mahajan]

On Tue, 18 Jul 2006, Idris Samawi Hamid wrote:

> On Tue, 18 Jul 2006 11:30:31 -0600, Aditya Mahajan <adityam@umich.edu>
> wrote:
>
>> Have a look at http://www-math.univ-poitiers.fr/~phan/statsmac.html to
>> see if can modify them to get the visual effect that you want.
>
> Will do: Hans, Aditya, can this be ported to MetaFun or its own m-stats
> module?

I do not use this too much. I had once tried porting metaobj to 
context, but found that it is easier to use raw metaobj. However, if 
you can come up with what you want a module to do, it is relatively 
straightforward to add context sugar around it.

Aditya

Re: ConTeXt, Charts, and transparency

[Aditya Mahajan]

On Tue, 18 Jul 2006, Aditya Mahajan wrote:

> On Sat, 15 Jul 2006, Adam Lindsay wrote:
>
>> Hans Hagen wrote:
>>> Idris Samawi Hamid wrote:
>>>> Yes, but that seems mainly geared towards flow charts, not graphical
>>>> charts. Can m-chart do things like the example png attached at the start
>>>> of the thread?
>>>>
>>> i lost that one; actually, willy egger is the most experienced chart user but he's on vacation
>>
>> It was more like a bar graph (with two sets of y-values), nothing to do
>> with m-charts. I thought about mp-graph stuff, but I don't see how it
>> can be (trivially) made to do that visual style.
>
> Have a look at http://www-math.univ-poitiers.fr/~phan/statsmac.html to
> see if can modify them to get the visual effect that you want.

There is also the ultimate reference 
http://zoonek.free.fr/LaTeX/Metapost/metapost.html Check out example 
from 285 onwards.

Also, gnuplot can draw bargraphs easily. Mojca's gnuplot module is 
functional, so you can also give that a try.

Aditya

Re: ConTeXt, Charts, and transparency

[Johan Sandblom]

The R module (and R program) may also be worth a look for any stats
and data visualization tasks.

Johan

2006/7/18, Aditya Mahajan <adityam@umich.edu>:
> On Tue, 18 Jul 2006, Aditya Mahajan wrote:
>
> > On Sat, 15 Jul 2006, Adam Lindsay wrote:
> >
> >> Hans Hagen wrote:
> >>> Idris Samawi Hamid wrote:
> >>>> Yes, but that seems mainly geared towards flow charts, not graphical
> >>>> charts. Can m-chart do things like the example png attached at the start
> >>>> of the thread?
> >>>>
> >>> i lost that one; actually, willy egger is the most experienced chart user but he's on vacation
> >>
> >> It was more like a bar graph (with two sets of y-values), nothing to do
> >> with m-charts. I thought about mp-graph stuff, but I don't see how it
> >> can be (trivially) made to do that visual style.
> >
> > Have a look at http://www-math.univ-poitiers.fr/~phan/statsmac.html to
> > see if can modify them to get the visual effect that you want.
>
> There is also the ultimate reference
> http://zoonek.free.fr/LaTeX/Metapost/metapost.html Check out example
> from 285 onwards.
>
> Also, gnuplot can draw bargraphs easily. Mojca's gnuplot module is
> functional, so you can also give that a try.
>
> Aditya
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> ntg-context mailing list
> ntg-context@ntg.nl
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>


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t +46851776108  17176 Stockholm
m +46735521477  Sweden
"What is wanted is not the will to believe, but the
will to find out, which is the exact opposite"
- Bertrand Russell

Re: ConTeXt, Charts, and transparency

[Idris Samawi Hamid]

On Tue, 18 Jul 2006 12:55:32 -0600, Aditya Mahajan <adityam@umich.edu>  
wrote:

> On Tue, 18 Jul 2006, Aditya Mahajan wrote:

> There is also the ultimate reference
> http://zoonek.free.fr/LaTeX/Metapost/metapost.html Check out example
> from 285 onwards.

That is a nice resource; thnx for pointing it out.

> Also, gnuplot can draw bargraphs easily. Mojca's gnuplot module is
> functional, so you can also give that a try.

Will do that as well -)

Best
Idris

-- 
Professor Idris Samawi Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80523

--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

Re: ConTeXt, Charts, and transparency

[Idris Samawi Hamid]

On Wed, 19 Jul 2006 02:07:38 -0600, Johan Sandblom <jsandblom@gmail.com>  
wrote:

> The R module (and R program) may also be worth a look for any stats
> and data visualization tasks.

What is this exactly? any links? I've heard esoteric references to R on  
this list but have no idea what it's about ;-)

Best
Idris

-- 
Professor Idris Samawi Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80523

--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

Re: ConTeXt, Charts, and transparency

[Mojca Miklavec]

On 7/19/06, Idris Samawi Hamid wrote:
> On Wed, 19 Jul 2006 02:07:38 -0600, Johan Sandblom <jsandblom@gmail.com>
> wrote:
>
> > The R module (and R program) may also be worth a look for any stats
> > and data visualization tasks.
>
> What is this exactly? any links? I've heard esoteric references to R on
> this list but have no idea what it's about ;-)

http://www.r-project.org/

Once you manage to install it you should try
    texexec --demo m-r.tex
The demo examples in m-r.tex are pretty good to give you an idea of
what is possible.

Mojca