Before revision:  We model the lack of information for a given object as  affine subspace in R^d with dimension k . Our goal in this paper is to find clusters of objects . The main problem is to cope with the partial information .
After revision:  We model the lack of information for a given object as affine subspace in R^d with dimension k . Our goal in this paper is to find clusters of objects where the main problem is to cope with the partial information .