🚀 go-pugleaf

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...

If you want to write your own routines, then the problem has two parts:
   i) designing the filter
  ii) processing the data

Numerical Recipies in C/Pascal/Fortran by Press, Flannery and others probably
contains most of what you need - but look before buying it, as this is from
memory :-)

Christopher Hicks

--
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 Christopher Hicks    |    If it doesn't fit...
 cmh@uk.ac.cam.eng    |                        ...you need a bigger hammer.
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