1. A method for fusing a plurality of data, the method comprising: inputting a plurality of N-dimensional uncertain data where N is a natural number not being a zero; representing the inputted plurality of uncertain data in a first form of a data set in a 2N-dimensional extended space; generating a second form of a data set by applying whitening transform WT to the 2N-dimensional extended space; acquiring a first point or first vector through a linear projection to a transformed constraint manifold from the second form of the data set; and generating a N-dimensional fused data by applying inverse-whitening transform to the first point or first vector.