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Topic: Coding Matlab function "filter" in C++
Replies: 6   Last Post: Feb 11, 2013 11:03 AM

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 Chris Heier Posts: 3 Registered: 11/29/05
Re: Coding Matlab function "filter" in C++
Posted: Nov 30, 2005 12:29 PM

> y(n) = k2*x(n) + k1*(1+k2)*x(n-1) + x(n-2) - k1*(1+k2)*y(n-1) - k2*y(n-2)

Hey thanks. That answers a ton for me. I guess the last thing I had
on my mind was in regards to n.

Since X would be a trace containing an array of samples, x[0] would
contain the first sample. In the algorithm, there is a point where it
is asking for x[n-1] and x[n-2]. In the case that n would equal 0, the
first part (n-1) would try to pull a value from the -1 element in the
array. How would I work around that for the first few elements of the
array?

Date Subject Author
11/29/05 Chris Heier
11/29/05 Peter Boettcher
11/30/05 Chris Heier
11/30/05 Peter Boettcher
11/30/05 Chris Heier
2/5/13 Hossein
2/11/13 Jan Simon