🚀 go-pugleaf

cmh@eng.cam.ac.uk (C.M. Hicks) writes:

> fitzpa@eeel.nist.gov (Gerry FitzPatrick) writes:
> 
> >I need to design a digital filter (either a notch filter or
> >a low-pass filter).  I will be analyzing data taken from a 
> >lecroy 7200 scope (in either ascii or binary).  I would like
> >I would like to look at the 60  Hz component of the waveform.
> 
> >Any ideas on how to write a subroutine that would perform this
> >digital filtering on stored data?  Any good books on designing
> >digital filters?
> 
> 'MatLab' from Mathsworks would be absolutely ideal, although rather expensive
> It is a data manipulation, analysis, and computational package, which has
> built-in routines for digital filtering, spectral analysis and graphical
> output (amongst many hundreds of other things). Runs on a 386 or better
> (and many other platforms such as NeXT, UN*X), but I think it requires a 
> co-processor. It will, undoubtedly, do everything you need, but maybe costs
> too much...

The Student Version of Matlab (distributed by Prentice-Hall, I believe)
is available at US $50.  Try the engineering section of a local college
bookstore.  This version will run on any PC-compatible, with or without
a math coprocessor.  However, for reasonable throughput, I recommend at
least an 8 MHz 80286 with a coprocessor.  (A Mac version is also available,
but I have not tried it.)

The student version is the same as the previous MATLAB v3.5 with some
additional m files from a couple of the toolboxes.  However, it is
limited to 1024 elements per variable, and one can print graphs only
with print screen.  For student work, these limitations are not
serious.

Although the program comes with a good manual, the manual will not
teach you how to design digitial filters.

I am an EE student and started using this program last semester.  It's
very powerful, not only for DSP, but for general purpose engineering
calculations.  A very good value if you can live with the matrix
size limitations.

There is a new newsgroup (1 or 2 weeks old) "comp.soft-sys.matlab",
that is devoted to Matlab.  It may not yet be available at all
sites.


----
Carlos Puig, KJ6ST             cpuig@infoserv.com
San Jose, CA                   (408) 289-8174