Mercurial > octave
changeset 1390:bdec2591f844
[project @ 1995-09-14 08:56:18 by jwe]
| author | jwe |
|---|---|
| date | Thu, 14 Sep 1995 08:56:18 +0000 |
| parents | affbd42dd0c1 |
| children | 02a4e580de4e |
| files | scripts/signal/filter.m |
| diffstat | 1 files changed, 5 insertions(+), 5 deletions(-) [+] |
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--- a/scripts/signal/filter.m Thu Sep 14 07:41:09 1995 +0000 +++ b/scripts/signal/filter.m Thu Sep 14 08:56:18 1995 +0000 @@ -5,15 +5,15 @@ # time-invariant difference equation: # # N M -# sum a(k+1) y(n-k) + sum b(k+1) x(n-k) = 0 for 1<=n<=length(x) +# sum a(k+1) y(n-k) = sum b(k+1) x(n-k) for 1<=n<=length(x) # k=0 k=0 # # where N=length(a)-1 and M=length(b)-1. An equivalent form of this # equation is: # -# N M -# y(n) = sum c(k+1) y(n-k) + sum d(k+1) x(n-k) for 1<=n<=length(x) -# k=1 k=0 +# N M +# y(n) = - sum c(k+1) y(n-k) + sum d(k+1) x(n-k) for 1<=n<=length(x) +# k=1 k=0 # # where c = a/a(1) and d = b/a(1). # @@ -26,7 +26,7 @@ # k=0 # H(z) = ---------------------- # N -# 1 + sum c(k+1) z(-k) +# 1 + sum c(k+1) z^(-k) # k=1 # # [y, sf] = filter(b,a,x,si) sets the initial state of the system, si,