function?allmode=ceemd（YNstdNETNM）

xsize=length（Y）;
dd=1:1:xsize;

%?Nornaliz?data
Ystd=std（Y）;
Y=Y/Ystd;

%?Initialize?saved?data
TNM2=TNM+2;?????%增加第1列是原始信號(hào)，最后第TNM+2列是余項(xiàng)
for?kk=1:1:TNM2
????for?ii=1:1:xsize
????????allmode（iikk）=0.0;
????end
end

for?iii=1:1:NE
%?adding?noise
????for?i=1:xsize
????????temp=randn（11）*Nstd;???%X1，X2增加同一噪聲
????????X1（i）=Y（i）+temp;
????????X2（i）=Y（i）-temp;
????end

%?sifting（篩選）?X1
????xorigin?=?X1;
????xend?=?xorigin;
%?save?the?initial?data?into?the?first?column
????for?jj=1:1:xsize
????????mode（jj1）?=?xorigin（jj）;
????end
????nmode?=?1;
????while?nmode?<=?TNM
?????????xstart?=?xend;
????????iter?=?1;
????????while?iter<=5??%迭代5次得到每個(gè)IMF，沒(méi)有用終止條件
?????????????[spmax?spmin?flag]=extrema（xstart）;
?????????????upper=?spline（spmax（:1）spmax（:2）dd）;
?????????????lower=?spline（spmin（:1）spmin（:2）dd）;
?????????????mean_ul?=?（upper?+?lower）/2;
?????????????xstart?=?xstart?-?mean_ul;
?????????????iter?=?iter?+1;
????????end
????????xend?=?xend?-?xstart;??%得到1個(gè)xstart=IMF1
????????nmode=nmode+1;?????????%繼續(xù)下一個(gè)IMF的篩選循環(huán)
????%?save?a?mode
????????for?jj=1:1:xsize
????????????mode（jjnmode）?=?xstart（jj）;
????????end
????end
????%?save?the?tre