%?EMD:??Emprical?mode?decomposition
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%?imf?=?emd（xn）
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%?x???-?input?signal?（must?be?a?column?vector）
%?n???-?number?of?intrinsic?mode?functions
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%?imf?-?Matrix?of?intrinsic?mode?functions?（each?as?a?row）
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%?See:??Huang?et?al?Royal?Society?Proceedings?on?Math?Physical?
%???????and?Engineering?Sciences?vol.?454?no.?1971?pp.?903-995?
%???????8?March?1998
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%?Author:?Ivan?Magrin-Chagnolleau??
%?
function?imf?=?emd（xn）;%%最好把函數(shù)名改為emd1之類(lèi)的，以免和Grilling的emd沖突????????????????????????
??????????????????????????????????%%n為你想得到的IMF的個(gè)數(shù)
c?=?x（:）‘;?%?copy?of?the?input?signal?（as?a?row?vector）
N?=?length（x）;-
%?loop?to?decompose?the?input?signal?into?n?successive?IMFs
imf?=?[];?%?Matrix?which?will?contain?the?successive?IMF?and?the?residuefor?t=1:n?

while