[scilab-Users] graphics speed from 4.1.2 to 5.0.2 and virtual graphical window

[Geraldo Netto]

Hi Guys,

It seems a java bottleneck
i mean this performance issue that comes from java architecture

while i'm pretty newbie to ensure this
i guess it can be improved by changing
the swing to another 'widget toolkit' like swt[1]
which uses a mix of java and native api to draw the interfaces....

[1] http://en.wikipedia.org/wiki/Standard_Widget_Toolkit

See Ya
(and i hope it helps :))

Geraldo
São Paulo, Brasil, -3gmt
site: http://exdev.sf.net/
msn: geraldo_boca_at_hotmail.com
skype: geraldo-netto
icq: 145-061-456

2008/10/1 bagvian <bagvian at gmail.com>:
> Hi there,
>
> My problem is the following: I want to generate many plots and export
> them as, say gif file to see them later.
> I wrote an example that does such a task:
>
> for i=0:9
>  // Create a graphival window
>  scf(i);
>  f=gcf()
>  f.figure_size= [1600,1200];
>
>  // Plot a first random function with using a couple of graphical options
>  subplot(2,1,1); plot(rand(1,100),'b-x');
>  a=gca();
>  a.tight_limits="on";
>  legends(["rand0"],[2],opt="ur");
>  xgrid(1);
>
>  // Plot a second random function
>  subplot(2,1,2); plot(rand(1,100),'b-x');
>  a=gca();
>  a.tight_limits="on";
>  legends(["rand1"],[2],opt="ur");
>  xgrid(1);
>
>  // Export plot into gif and delete the current graphical window
>  xs2gif(i,sprintf('image_%d.gif',i));
>  xdel(i);
> end
>
> This program runs within 75s with Scilab 5.0.2 on my computer.
> Now, it runs within only 5s with Scilab 4.1.2 on the same computer.
>
> Is there an explanation for this lack of performance reached by 5.0.2?
> Is there a way to improve the function above to get a fast result with 5.0.2?
>
> The best way would be not to create a visible graphical window but
> create a "virtual graphical window" instead that cannot be seen but
> that can be used to export graphics.
> Any idea about how to do such a thing?
>
> Thanks a lot in advance.
> Cheers, B.
>