6. The method as set forth in claim 3 , wherein the determining further comprises: for the first dimension of the vector space, approximating the one-dimensional function by a piecewise combination of one-dimensional analytical functions; and repeating the approximating for the one-dimensional functions of the remaining dimensions of the vector space.
3. The method as set forth in claim 1 , wherein the transforming comprises: for a first dimension of the vector space, determining a one-dimensional function based on (i) the vector element comparison of the comparison function for the first dimension of the vector space and (ii) trained parameters of the trained linear classifier; and repeating the determining for the remaining dimensions of the vector space.