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A = xlsread('D:\test.xls')
x = unique(A(:,1));
n = length(x);
for i =1:n   %»Ø¹é´ÎÊý
      B=A(A(:,1)==x(i),4);
      C=A(A(:,1)==x(i),2);
      D=A(A(:,1)==x(i),3);
      X=ones(length(B),1);
     [b,bint,r,rint,stats] = regress(B,[X,C,D]);
     s(i,=b'
     ss(i,=stats
     whichstats = {'tstat'};
     stats = regstats(B,[C,D],'linear',whichstats);
     stats= stats.tstat
end
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