calculate angle between 2 n-dimentional vectors with missing data

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Brandon 2014-12-30

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评论： Matt J 2014-12-31

I have a matrix with the rows containing the n dimensions of 2 vectors. I want to calculate the angle of difference for each row. The issue I have is that some of the cells are missing and so I don't want either of the vectors values for that dimension in the row to go into the calculation.

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Matt J 2014-12-30

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编辑：Matt J 2014-12-31

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So your matrix A is n x 2 and your the missing elements are NaNs? If so,

        idx = all(~isnan(A),2); %EDITED
        B=A(idx,:);
        norms = prod(sqrt(sum(B.^2)));
        dotprod= sum(prod(B,2));
        result = acosd( dotprod/norms), %angleDiff