%---------------------------------------------------------------------------------------
%?defines?new?extrema?points?to?extend?the?interpolations?at?the?edges?of?the
%?signal?（mainly?mirror?symmetry）
%?t?and?x?are?input?variables;
%?nbsym?is?the?number?of?extremes?who?are?about?to?be?extented.
function?[ttxx]?=?mirror_extend（txnbsym）

	lx?=?length（x）;
????
????indmax=find（diff（sign（diff（x）））==-2）+1;
????indmin=find（diff（sign（diff（x）））==2）+1;
	
	if?（length（indmin）?+?length（indmax）?		error（‘not?enough?extrema‘）
	end

????%?boundary?conditions?for?interpolations?:
	if?indmax（1）?????	if?x（1）?>?x（indmin（1））
????????????sym_1=indmax（1）;
????????????lsym?=?t（indmax（1））;
????????????tstar=2*lsym-fliplr（t（indmax（1）:indmax（min（endnbsym+1））））;
????????????x

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????3199??2009-10-26?11:25??mirror_extend.m

-----------?---------??----------?-----??----

?????????????????3199????????????????????1