Re: How many users of Octave and Scilab are there?

On Thu, 13 Nov 2008 19:07:38 -0800, workaholic wrote:

On 11月14日, 上午10时50分, Tim Wescott <t...@xxxxxxxxxxxxxxxx> wrote:
On Wed, 12 Nov 2008 21:48:13 -0800, workaholic wrote:
On 11月13日, 上午6时29分, pnachtwey <pnacht...@xxxxxxxxx> wrote:
On Nov 11, 8:33 pm, Tim Wescott <t...@xxxxxxxxxxxxxxxxxxxx> wrote:

On Tue, 11 Nov 2008 17:55:30 -0800, pnachtwey wrote:
On Nov 11, 11:58 am, qfufs...@xxxxxxxxx wrote:
I see that Matlab/Simulink is very popular at universities.

How many of you are using Octave or Scilab open source products
for simulation?

How well do they work?

Thanks,

Peter Way

I did use Scilab a bit. I tried using Scilab to solve a
significant motion profile generator problem. I found that
Scilab's debugging didn't work very well. HMI programming is
awkward. I went back to C and C++. I haven't used the Scicos
part which is what you really should be asking about since it
directly competes with SimApp.

Peter Nachtwey

OTOH, I use Scilab all the time.

I stopped using Simulink the second time I had a big simulation
break thanks to a MatLab upgrade, so I'm out of the habit now with
Scilab.

The debugging has gotten miles better in recent versions, although
the move to 5.0.x was huge (they migrated from Tcl to Java) and
they're still shaking the bugs out.

I didn't notice the migration to Java. I will look into it. That
may restart my interest.
Right now I am writing a hydraulic servo simulator in java. I had
considered doing it in Scilab but switched to Java when my previous
project didn't work too well.

Peter Nachtwey

Is simapp or Scilab widely used in control engineering? As far as I
know, in China, we mostly use Matlab and Simuboth in both industry
and academics. Scilab is used in some embedded systems to run some
complicated algorithms.

I can get Matlab with all the toolboxes and extra bits I need to do
control engineering with about the same amount of money as I could
spend to get a nice, reliable, late model used small car. Then the
next year I can get it all upgraded for the price of a major repair to
the car.

I can get Scilab for the price of a download, it does nearly everything
that Matlab does plus plenty that Matlab doesn't, and upgrades cost
nothing.

Since I don't have a big corporation with more dollars than sense
backing me, guess which one I use.

How much does a Matlab seat with all the control systems trimmings cost
in China?

--
Tim Wescott
Control systems and communications
consultinghttp://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes,http://www.wescottdesign.com/actfes/actfes.html-
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Well.... students cannot afford it, which is often paid by the
university, and of course, most of us use the pirated ones....

If I could steal the car that's as valuable as a Matlab seat I wouldn't,
even if I could do it without getting caught.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
.

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