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    文件類型: .m
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    發(fā)布日期: 2021-06-14
  • 語(yǔ)言: Matlab
  • 標(biāo)簽: EMD??小波變換??

資源簡(jiǎn)介

專門用來(lái)處理非線性非平穩(wěn)信號(hào)的工具~~~相當(dāng)經(jīng)典~~~編寫的時(shí)間是2012年10月1日

資源截圖

代碼片段和文件信息

%%?EMD-WP方法:

%?作者:************
%?時(shí)間:2012年************



function?Emd_Wp(dataNNk)

X=data(1:NN);

%%?參數(shù)設(shè)置
fs=12000;?%采樣頻率
N?=?length(X);
y_imf=emd(X);?%Emd處理
[y_IMFIMF_lastrest]=IMF_Choose(Xy_imfk);%本征模分量的選擇
[mn]=size(y_IMF);
f=(0:N-1)*fs/N;?%頻率的變化范圍。
t=(0:N-1)/N*(N/fs);?%時(shí)間的變化范圍。
Fs=1/(t(2)-t(1));


%%?EMD處理后的IMF圖
if?(m-1)>=4???
????figure;?
????for?i=1:4?%1~4
????????subplot(41i);
????????plot(ty_IMF(i:));
????????title([‘IMF‘num2str(i)]);%num2str:數(shù)字轉(zhuǎn)化為字符串
????end????
????if?floor((m-1)/4)>=2?%5~8。floot:取商???
????????figure;??
????????for?i=5:8????????
????????????subplot(41i-4);????????
????????????plot(ty_IMF(i:));????
????????????title([‘IMF‘num2str(i)]);
????????end???????
????????if?floor((m-1)/4)>=3%9~12
????????????figure;?
????????????for?i=9:12????????
????????????????subplot(41i-8);????????
????????????????plot(ty_IMF(i:));?
????????????????title([‘IMF‘num2str(i)]);
????????????end
????????????if?floor((m-1)/4)==3%13~...
????????????????figure;
????????????????for?i=13:(mod((m-1)4)+12)??????
????????????????????subplot(41i-12);????????
????????????????????plot(ty_IMF(i:));
????????????????????title([‘IMF‘num2str(i)]);
????????????????end
????????????end
????????else
????????????if?m>9
????????????figure;?
????????????for?i=9:(rem((m-1)4)+8)%9~...。?取余
????????????????subplot(41i-8);????????
????????????????plot(ty_IMF(i:));????
????????????????title([‘IMF‘num2str(i)]);
????????????end
????????????end
????????end?????
????else
????????if?m-1~=4
????????????figure;
????????????for?i=5:(rem((m-1)4)+4)%5~...。
????????????????subplot(41i-4);????????
????????????????plot(ty_IMF(i:));????
????????????????title([‘IMF‘num2str(i)]);
????????????end
????????end
????end
else
????figure;
????for?i=1:m-1?
????????subplot(31i);
????????plot(ty_IMF(i:));
????????title([‘IMF‘num2str(i)]);%num2str:數(shù)字轉(zhuǎn)化為字符串
????end
end
%最后一個(gè)剩余分量residual的圖形
figure;
plot(ty_IMF(m:));
title(‘殘余量‘);


%%?對(duì)IMF進(jìn)行一維小波包的分解,返回小波包結(jié)構(gòu)樹T
%?T=wpdec(XN‘wname‘EP)
%?wname=input(‘請(qǐng)輸入進(jìn)行小波包分解的小波函數(shù)(僅限db小波):‘‘s‘);
%?num=input(‘請(qǐng)輸入進(jìn)行小波包分解的層數(shù):‘);
%?for?i=1:m-1
%?????T=wpdec(y_IMF(i:)numwname‘shannon‘);
%?????plot(T);
%?end


%%?選擇感興趣的IMF。
int_IMF=input(‘請(qǐng)輸入對(duì)第幾個(gè)IMF感興趣(數(shù)字):‘);


%%?用W

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