32 lines
1002 B
Matlab
32 lines
1002 B
Matlab
function Z = projectData(X, U, K)
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%PROJECTDATA Computes the reduced data representation when projecting only
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%on to the top k eigenvectors
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% Z = projectData(X, U, K) computes the projection of
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% the normalized inputs X into the reduced dimensional space spanned by
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% the first K columns of U. It returns the projected examples in Z.
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%
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% You need to return the following variables correctly.
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Z = zeros(size(X, 1), K);
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m = rows(X);
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% ====================== YOUR CODE HERE ======================
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% Instructions: Compute the projection of the data using only the top K
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% eigenvectors in U (first K columns).
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% For the i-th example X(i,:), the projection on to the k-th
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% eigenvector is given as follows:
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% x = X(i, :)';
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% projection_k = x' * U(:, k);
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%
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for i =1:m
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for j =1:K
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x = X(i, :)';
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Z(i,j) = x' * U(:, j);
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endfor
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endfor
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% =============================================================
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end
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