[Scilab-users] Possible bug: export to JPEG

2018-06-11 Thread Lester Anderson
 Hi all,

I am using Scilab 6.0.1 and there seems to be an issue with export to JPEG
(low or high resolution). See attached low-res image.

Tested this using xs2jpg and export figure from the graphic.

Other export options seem to be fine, PNG has no problem.

Cheers
Lester
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Re: [Scilab-users] Possible bug: export to JPEG

2018-06-11 Thread amonmayr

Hello Lester,

It might be unrelated, but at some point, there was an issue with 
displayed or exported graphics being pink or reddish.

It was always due to the drivers of the graphic card.
Could you try to upgrade (or downgrade) your drivers?

Hope it helps,

Antoine


Le 11/06/2018 à 09:47, Lester Anderson a écrit :

Hi all,

I am using Scilab 6.0.1 and there seems to be an issue with export to 
JPEG (low or high resolution). See attached low-res image.


Tested this using xs2jpg and export figure from the graphic.

Other export options seem to be fine, PNG has no problem.

Cheers
Lester


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Re: [Scilab-users] Possible bug: export to JPEG

2018-06-11 Thread Stéphane Mottelet

This is a kown problem, see http://bugzilla.scilab.org/show_bug.cgi?id=14264

Le 11/06/2018 à 09:47, Lester Anderson a écrit :

Hi all,

I am using Scilab 6.0.1 and there seems to be an issue with export to 
JPEG (low or high resolution). See attached low-res image.


Tested this using xs2jpg and export figure from the graphic.

Other export options seem to be fine, PNG has no problem.

Cheers
Lester


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--
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet

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Re: [Scilab-users] {EXT} Re: Empty matrix

2018-06-11 Thread Dang Ngoc Chan, Christophe
Hello,

> De : users [mailto:users-boun...@lists.scilab.org] De la part de Rafael Guerra
> Envoyé : mardi 5 juin 2018 23:42
>
> Fyi, the following reference on empty matrices algebra is extremelly good 
> [...]
> Nett, C. N.  and W. M. Haddad [1993] "A system-theoretic appropriate 
> realization of the empty matrix concept,"
> IEEE Transactions on Automatic Control, vol. 38, no. 5, pp. 771-775

Thanks for this reference. It can be found here:
https://haddad.gatech.edu/journal/00277245.pdf

Some quotations:

"The elegance afforded by the empty matrix approach can
potentially be exploited to great advantage in the context of
large-scale software development. Indeed, the traditional approach
to special cases one must include in the software explicit
checks for special cases along with appropriate provisions for
each special case. This would be done for each matrix formula
implemented in the software with potential for special cases of
the type described above. Using the empty matrix approach, one
would simply introduce the empty matrix as an object, or data
type, and then code its algebraic realization. This would be done
only once. Subsequent code would then be devoid of cumbersome
explicit checks and provisions for special cases of the type
described above."

" Additionally,
the examples are used to show how the empty matrix concept
can be utilized to transparently handle static and/or single
vector input, single vector output (SVISVO) systems within the
more general context of dynamic, two vector input, two vector
output (TVITVO) systems"

So, it seems that having a correct algebraic handling of the empty matrixes
could be of great interest for some users.

I might post a wish on Bugzilla but not right now,
so if someone else is willing to do this...

--
Christophe Dang Ngoc Chan
Mechanical calculation engineer
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Re: [Scilab-users] Possible bug: export to JPEG

2018-06-11 Thread Lester Anderson
Hi Antoine,
Thanks for the info. I tested the code on a pc with nvidia card and a
laptop with just a basic Intel hd graphics chip, same result but only with
jpeg. PNG files work fine, would tgat be affected if it was a driver issue?
Got the latest drivers.

Not a big deal as I can convert the png files to jpeg. Will just save as
png for now.
Lester

On 08:55, Mon, 11 Jun 2018 ,  wrote:

> Hello Lester,
>
> It might be unrelated, but at some point, there was an issue with
> displayed or exported graphics being pink or reddish.
> It was always due to the drivers of the graphic card.
> Could you try to upgrade (or downgrade) your drivers?
>
> Hope it helps,
>
> Antoine
>
>
> Le 11/06/2018 à 09:47, Lester Anderson a écrit :
>
> Hi all,
>
> I am using Scilab 6.0.1 and there seems to be an issue with export to JPEG
> (low or high resolution). See attached low-res image.
>
> Tested this using xs2jpg and export figure from the graphic.
>
> Other export options seem to be fine, PNG has no problem.
>
> Cheers
> Lester
>
>
> ___
> users mailing 
> listusers@lists.scilab.orghttp://lists.scilab.org/mailman/listinfo/users
>
>
> --
> +++
>
>  Antoine Monmayrant LAAS - CNRS
>  7 avenue du Colonel Roche
>  BP 54200
>  31031 TOULOUSE Cedex 4
>  FRANCE
>
>  Tel:+33 5 61 33 64 59
>
>  email : antoine.monmayr...@laas.fr
>  permanent email : antoine.monmayr...@polytechnique.org
>
> +++
>
>
> ___
> users mailing list
> users@lists.scilab.org
> http://lists.scilab.org/mailman/listinfo/users
>
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