code: public int rank() {
          if( is64 ) {
              return SingularOps_DDRM.rank((SingularValueDecomposition_F64)svd, tol);
          } else {
              return SingularOps_FDRM.rank((SingularValueDecomposition_F32)svd, (float)tol);
          }
      }
docs: Returns the rank of the decomposed matrix.
  
  @see SingularOps_DDRM#rank(SingularValueDecomposition_F64, double)
  
  @return The matrix's rank