Filtering a matrix column with different cutoff

1 次查看（过去 30 天）
Bruno
Bruno 2016-3-26
评论： Bruno 2016-3-26
I’ ve looking for a method to filter each column of data (101X62) with specific cutoff (1X63). Please, could someone indicate me the problem? Thanks B
x=data
fs=60;
fc=cutoff;
for idx = 1:numel(x);
[b,a] = butter(2, fc/(fs/2));
y = filter(b,a,x); %// output
end
  3 个评论
显示 1更早的评论
Bruno
Bruno 2016-3-26
Hi Ced, cutoff frequency (1x62) are different for each column.
Ced
Ced 2016-3-26
Yes, but since you are designing your filter in the loop, you can select a different cutoff for each loop iteration, right? Have a look at Image Analyst's answer, he wrote it out for you. You of course still have to define your cutoff vector.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2016-3-26
编辑：Image Analyst 2016-3-26
Perhaps you meant this:
[rows, columns] = size(data);
y = zeros(size(data));
fs = 60;
for k = 1 : columns
thisColumn = data(:, k); % Extract this one column
fc = cutoff(k); % Extract this one cutoff value.
% Determine filter parameters.
[b,a] = butter(2, fc/(fs/2));
% Do the filtering, and put result into column k of the output y
y(:,k) = filter(b, a, thisColumn);
end

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Butterworth 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by