现在,我想要对脑电信号进行去噪,我有一个脑电信号( 2048个系数),在运行Daubechies4之后,我也获得了2048个系数,我想知道如何确定细节和近似系数,daubechies4是4级daubechies还是1级daubechies4函数?太感谢了。有没有可以帮助我的教程?
发布于 2014-01-06 14:52:25
您可以通过以下方式完成此操作
% Do the Wavelet Transform
[c, l] = wavedec(data, wavelet_level, wavelet_name); % data is a single channel eeg data
% Get the detail and approximate coefficients at each level
for k = 1:wavelet_level
det_coeff = detcoef(c,l,k); % detail coefficients at level k
app_coeff = appcoef(c,l,wavelet_name,k) % approximate coefficients at level k
end
查看下面的out站点
http://www.mathworks.in/help/wavelet/ref/appcoef.html http://www.mathworks.in/help/wavelet/ref/detcoef.html
https://stackoverflow.com/questions/20905329
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