[SI-LIST] Re: Simple tool for FIR filters

My favorite free tool for this kind of work is Scilab, which is a
Matlab knockoff done by a university in France.  It's a great tool --
besides the Scilab language & shell itself, the package includes a
development environment, easy facilities for graphing, and a signal
processing toolkit called Scicos.  

I like it better than Matlab 'cause it runs on both Linux and Windoze,
and it's free -- you never run into the problem of finding that you
need to shell out another $500 just to get the toolbox you forgot to
order the first time around . . . . 

It is available under:

http://www.scilab.org/

Stuart

> 
> 
> Chris -- I usually use Matlab for such things.  If you already know the 
> tool, it's a few minutes to implement.  If you don't, then there's 
> probably a learning curve, but I don't think it's that steep.  Their web 
> site is http://www.mathworks.com.
> 
> Matlab has a filter design toolbox which I have never used, and also a 
> signal processing toolbox.  Neither is necessary for doing an FFT, 
> plotting, zero-padding, downsampling, filtering, or whatever you have in 
> mind.
> 
> I think there's a GNU-like freeware incantation called "Octave", but 
> I've never used it, and don't know what platforms are supported.  I 
> think it's supposed to be nearly line-for-line compatible with many of 
> the basic Matlab capabilities.
> 
>    -- Steve
> 
> -------------------------------------------
> Steven D. Corey, Ph.D.
> Time Domain Analysis Systems, Inc.
> "The Interconnect Modeling Company."
> http://www.tdasystems.com
> 
> email: steve@xxxxxxxxxxxxxx
> phone: (503) 246-2272
> fax:   (503) 246-2282
> -------------------------------------------
> 
> 
> 
> 
> Chris Cheng wrote:
> 
> > 
> > Hi there,
> > Is there any simple discrete time Fourier transform tool that can be used to
> > visualize FIR filters in frequency domain ?
> > Thanks in advanced.
> > Chris
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