Need Help with apply lowpass filter with window method lowpass design
2 views (last 30 days)
Show older comments
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/515937/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/515942/image.png)
Hello, I'm trying to filter out the noise of my csv file data using lowpass at cut of freq of 5 hz but it give me this error. Any suggestion?
Thank you in advance
5 Comments
Mathieu NOE
on 23 Feb 2021
hello
filter requires 3 input arguments, filter(b,a,x).
you cannot give a tf object as input argument of filter
your filter must be given as a numerator (b) and a denominator (a)
filter One-dimensional digital filter.
Y = filter(B,A,X) filters the data in vector X with the
filter described by vectors A and B to create the filtered
data Y. The filter is a "Direct Form II Transposed"
implementation of the standard difference equation:
a(1)*y(n) = b(1)*x(n) + b(2)*x(n-1) + ... + b(nb+1)*x(n-nb)
- a(2)*y(n-1) - ... - a(na+1)*y(n-na)
If a(1) is not equal to 1, filter normalizes the filter
coefficients by a(1).
Answers (0)
See Also
Categories
Find more on Filter Design in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!