Anybody using Scilab?

Started by JBK September 5, 2003
Hello,

I want to do IIR filtering in Scilab, but can't really figure out how it all
works. The Matlab code for what I want to do would look something like this:

x = some signal...
B = [1 2 3];
A = [4 5 6];
y = filter(B,A,x);

Now, that's quite simple, but how do I do the same thing in Scilab? It looks
like I should be using flts(), but I can't really figure out how to
translate my coefficient vectors A & B into whatever formatting flts()
expects.

Thanks,
Jesper


Thus spake JBK:
> Hello, > > I want to do IIR filtering in Scilab, but can't really figure out how it all > works. The Matlab code for what I want to do would look something like this: > > x = some signal... > B = [1 2 3]; > A = [4 5 6]; > y = filter(B,A,x); > > Now, that's quite simple, but how do I do the same thing in Scilab? It looks > like I should be using flts(), but I can't really figure out how to > translate my coefficient vectors A & B into whatever formatting flts() > expects.
This may not help you at all... but if the reason you're using Scilab is because it's a free simulation package, you could try octave (www.octave.org) -- it is also a free simulation package, but it is largely code compatible with MatLab. Virtually all the (albeit fairly basic I imagine) simulations I've written in MatLab run without changes in octave. Your code above would certainly work. I haven't tried the windows version, but there certainly is one mentioned on the downloads page. Might be completely useless to you if you're set on using SciLab, but I figured it couldn't hurt! Cheers, Al
> This may not help you at all... but if the reason you're using Scilab is > because it's a free simulation package, you could try octave > (www.octave.org) -- it is also a free simulation package, but it is > largely code compatible with MatLab. Virtually all the (albeit fairly > basic I imagine) simulations I've written in MatLab run without changes > in octave. Your code above would certainly work. > > I haven't tried the windows version, but there certainly is one > mentioned on the downloads page. > > Might be completely useless to you if you're set on using SciLab, but I > figured it couldn't hurt! > > Cheers, > > Al
As you've already guessed the only reason I use Scilab is that it is free. I would definitely prefer Matlab if it hadn't been for the ridiculous price. I know that Octave is more Matlab-compatible, but the signal-processing toolbox in Scilab is far more extensive than the one in Octave. Thanks anyway, Jesper
Maybe 'frmag' will help somehow?
"JBK" <jesper.kristensen@virginNOSPAM.net> wrote in message
news:4jbajb.m5d.ln@172.16.100.88...
> > This may not help you at all... but if the reason you're using Scilab is > > because it's a free simulation package, you could try octave > > (www.octave.org) -- it is also a free simulation package, but it is > > largely code compatible with MatLab. Virtually all the (albeit fairly > > basic I imagine) simulations I've written in MatLab run without changes > > in octave. Your code above would certainly work. > > > > I haven't tried the windows version, but there certainly is one > > mentioned on the downloads page. > > > > Might be completely useless to you if you're set on using SciLab, but I > > figured it couldn't hurt! > > > > Cheers, > > > > Al > > As you've already guessed the only reason I use Scilab is that it is free.
I
> would definitely prefer Matlab if it hadn't been for the ridiculous price.
I
> know that Octave is more Matlab-compatible, but the signal-processing > toolbox in Scilab is far more extensive than the one in Octave. > > Thanks anyway, > Jesper > >
Hi Jesper,

> I want to do IIR filtering in Scilab
I _think_ you're looking for rtitr() (I've never tried it so YMMV). HTH, Rick Armstrong (reply address is bogus)

JBK wrote:
> > As you've already guessed the only reason I use Scilab is that it is free. I > would definitely prefer Matlab if it hadn't been for the ridiculous price. I > know that Octave is more Matlab-compatible, but the signal-processing > toolbox in Scilab is far more extensive than the one in Octave. >
The Matlab student price is very reasonable and their policy for qualifying as a student is too. (At least it used to be.) Bob -- "Things should be described as simply as possible, but no simpler." A. Einstein
> The Matlab student price is very reasonable and their policy > for qualifying as a student is too. (At least it used to > be.)
How about not being a student at all? And can a student license be used for commercial use as well? /Jesper
no, in the student license agreement it explicity says "non-commercial"


JBK wrote:
>>The Matlab student price is very reasonable and their policy >>for qualifying as a student is too. (At least it used to >>be.) > > > How about not being a student at all? > And can a student license be used for commercial use as well? > > /Jesper > >
there's a dedicated newsgroup
comp.soft.sys.math.scilab
you should try to ask there

good luck!

"JBK" <jesper.kristensen@virginNOSPAM.net> ha scritto nel messaggio
news:973ajb.o1e.ln@172.16.100.88...
> Hello, > > I want to do IIR filtering in Scilab, but can't really figure out how it
all
> works. The Matlab code for what I want to do would look something like
this:
> > x = some signal... > B = [1 2 3]; > A = [4 5 6]; > y = filter(B,A,x); > > Now, that's quite simple, but how do I do the same thing in Scilab? It
looks
> like I should be using flts(), but I can't really figure out how to > translate my coefficient vectors A & B into whatever formatting flts() > expects. > > Thanks, > Jesper > >
You might also look at O-Matrix, (http://www.omatrix.com).  It's not free,
but it's quite inexpensive and provides support and other commercial
benefits.


"A. S. Budden" <newsreader.mail@NOSPAM.southparade.vispa.com> wrote in
message news:20030905141247.GA29148@zakalwe...
> Thus spake JBK: > > Hello, > > > > I want to do IIR filtering in Scilab, but can't really figure out how it
all
> > works. The Matlab code for what I want to do would look something like
this:
> > > > x = some signal... > > B = [1 2 3]; > > A = [4 5 6]; > > y = filter(B,A,x); > > > > Now, that's quite simple, but how do I do the same thing in Scilab? It
looks
> > like I should be using flts(), but I can't really figure out how to > > translate my coefficient vectors A & B into whatever formatting flts() > > expects. > > This may not help you at all... but if the reason you're using Scilab is > because it's a free simulation package, you could try octave > (www.octave.org) -- it is also a free simulation package, but it is > largely code compatible with MatLab. Virtually all the (albeit fairly > basic I imagine) simulations I've written in MatLab run without changes > in octave. Your code above would certainly work. > > I haven't tried the windows version, but there certainly is one > mentioned on the downloads page. > > Might be completely useless to you if you're set on using SciLab, but I > figured it couldn't hurt! > > Cheers, > > Al