Recover data
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1 changed files with 11 additions and 3 deletions
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@ -1,7 +1,7 @@
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function X_rec = recoverData(Z, U, K)
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function X_rec = recoverData(Z, U, K)
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%RECOVERDATA Recovers an approximation of the original data when using the
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%RECOVERDATA Recovers an approximation of the original data when using the
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%projected data
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%projected data
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% X_rec = RECOVERDATA(Z, U, K) recovers an approximation the
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% X_rec = RECOVERDATA(Z, U, K) recovers an approximation the
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% original data that has been reduced to K dimensions. It returns the
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% original data that has been reduced to K dimensions. It returns the
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% approximate reconstruction in X_rec.
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% approximate reconstruction in X_rec.
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%
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%
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@ -19,9 +19,17 @@ X_rec = zeros(size(Z, 1), size(U, 1));
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% recovered_j = v' * U(j, 1:K)';
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% recovered_j = v' * U(j, 1:K)';
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%
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%
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% Notice that U(j, 1:K) is a row vector.
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% Notice that U(j, 1:K) is a row vector.
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%
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%
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U_reduce = U(:, 1:K);
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for i = 1:size(Z, 1)
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z = Z(i, :)';
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x_rec = z' * U_reduce';
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X_rec(i, :) = x_rec;
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end
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% =============================================================
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% =============================================================
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