+
−function X_rec = recoverData(Z, U, K)
+
−  ##RECOVERDATA Recovers an approximation of the original data when using the 
+
−  ##projected data
+
−  ##   X_rec = RECOVERDATA(Z, U, K) recovers an approximation the 
+
−  ##   original data that has been reduced to K dimensions. It returns the
+
−  ##   approximate reconstruction in X_rec.
+
−  ##
+
−  
+
−  X_rec = Z*U(:, 1:K)';
+
−
+
−end