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С¹ð×Ó1129

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clear;
close all;
clc;
aa=[259 372 340 220;275 411 353 230;285 428 364 243];
bb=reshape(aa',[],1);
figure,plot(bb,'o-');
title('ijµØÇø¸÷¼¾¶ÈסԺÈËÊý£¨01-03Ä꣩');
tt=[1:length(bb)]';
N=length(tt);
figure,autocorr(bb);
p=polyfit(tt,bb,1);
ytrend=polyval(p,tt);
figure,plot(ytrend);
yre=bb./ytrend;
figure,plot(yre);
yy=reshape(yre,4,[]);
ysea=mean(yy');
yper=repmat(ysea,1,3);
ydesea=bb./yper';
p=polyfit(tt,ydesea,1);
tt2=[1:16]';
ytrend2=polyval(p,tt2);
yper=repmat(ysea,1,4);
ypredict=ytrend2.*yper';
figure,plot(tt,bb,'-.*',tt2,ypredict,'-.o');
legend('²âÁ¿Öµ','Ô¤²âÖµ')
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