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Error taking inverse of a matrix

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cdob
cdob 2015-3-20
评论： Roger Stafford 2015-3-20
Hi,
I am receiving the error, "Subscript indices must either be real positive integers or logicals", when I attempt to take the inverse of a matrix. Can somebody please help me? Here is my code:
C = xlsread('OP_data.xlsx'); D = C;
y = log(C(:,3));
D(any(C==0,2),:)=[]; y(any(C==0,2),:)=[];
X = [ones(size(D,1),1),log(D(:,5)),log(D(:,6))];
Beta = inv(X'*X)*(X'*y);
Any help would be greatly appreciated!
  1 个评论
Roger Stafford
Roger Stafford 2015-3-20
Somewhere in your system there may be a variable with the name 'inv', which causes matlab to misinterpret your line "Beta = inv(X'*X)*(X'*y);". Try doing a
whos
to see if 'inv' shows up.

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