Butterworth filter design calls bilinear and fails
3 次查看(过去 30 天)
显示 更早的评论
I am attempting to set up a simple low-pass Butterworth filter using the following line of code:
[b,a]=butter(2,1/8,'low');
This produces the following error(s):
Error using bilinear
Too many output arguments.
Error in butter>butterImpl (line 130)
[ad,bd,cd,dd] = bilinear(ad,bd,cd,dd,fs);
Error in butter (line 59)
[varargout{1:nargout}] = butterImpl(n,Wn,varargin{:});
As far as I can tell, this is a valid call of bilinear (i.e. five inputs, four outputs). Can anyone replicate this problem? I'm using R2020b Update 3 with the signal processing toolbox. I haven't changed the butter function at all.
2 个评论
Mathieu NOE
2021-1-20
hi
it works on my R2020b Update 1
>> [b,a]=butter(2,1/8,'low');
>> b
b =
0.0300 0.0599 0.0300
>> a
a =
1.0000 -1.4542 0.5741
采纳的回答
Adam Danz
2021-1-20
编辑:Adam Danz
2021-1-22
You likely had another file on your Matlab path with the same name as butter. If the error happens again, the following command will show all functions and files of that name and will indicate which one you're using. Remove the path(s) to the functions that don't point to Matlab's butter() or rename the custom files/functions.
which butter -all
should point to \toolbox\signal\signal\butter.m (in r2020b).
更多回答(0 个)
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!