[R] Filter design in R?

[dgaich@hotmail.com]

Israel Christie <ichristie at gmail.com> writes:

> Dr. Williams,
> I ran across your inquiry on one of the R-help mailing lists regarding 
> digital filter design and implementation. I found no response to your 
> email in the archives and was wondering if you were able to find anything.
>

if you have mkfilter then something like 

> ?system
> foo <- system("mkfilter -Bu -Lp -o 2 -a 0.2 -l", T,T)

will give you coefficients for Butterworth Low pass 2nd order filter w cuttof at 0.2;
extract the coefficients from foo and feed it to filter.

Dragan Gajic