I am trying to filter noise present in the signal so that it gives me a smooth curve.But the signal is not getting filtered.Any help?

1 次查看（过去 30 天）

preeti visweswaran 2017-4-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/336223-i-am-trying-to-filter-noise-present-in-the-signal-so-that-it-gives-me-a-smooth-curve-but-the-signal

评论： preeti visweswaran 2017-4-20

forRef_2.xls

Following is the code to filter out noise.Kindly let me know why i dont see the filtered signal.I want to get output like the one attached.Attached is the input file.I am working on the last column.

file = 'forRef_2.xls';

col = xlsread(file,'J:J');x_mags=abs(fft(col));

%num_bins=length(x_mags);

[b a]=butter(2,0.3,'low');

x_filtered=filter(b,a,col);

figure;

plot(col)

hold on

plot(x_filtered,'r')

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

preeti visweswaran 2017-4-20

Can i get a help in this

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

请先登录，再回答此问题。

类别

Signal Processing Signal Processing Toolbox Digital and Analog Filters Digital Filter Analysis

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

Community Treasure Hunt

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

Start Hunting!

Translated by