清空筛选条件
清空筛选条件

how to use Butterworth filter to get rid of noise?

2 次查看（过去 30 天）
Ahmed Emam
Ahmed Emam 2018-9-17
评论： Star Strider 2018-9-17
I cannot figure out how to use a lowpass butterworth filter on this piece of data.
Here is what I have so far
Ts = mean(diff(x));
Fs = 1/Ts;
Fn = Fs/2;
I found the sample rate to find Wn, however I do not know what to set the cutoff value.
Wn1=10/(Fn);
[b,a] = butter(6,Wn1,'low');
y2 = filter(b,a,y_pr);
unfortunately this would distort the data and make most peaks the same height
  1 个评论
Star Strider
Star Strider 2018-9-17
Ahmed Emam later added:
‘... my code is also required to handle a sampling rate varying from 0.5 kHz to 2 kHz. I wanted to use the lowpass option in the butterworth filter. The output I am looking for is the same EKG graph but with less noise.’
This is not a trivial omission.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

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

标签

产品


版本

R2018a

Community Treasure Hunt

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

Start Hunting!

Translated by