question: get the number of vectors in the sample . concode_field_sep long serialVersionUID concode_elem_sep boolean isBiasCorrected concode_elem_sep double[] sums concode_elem_sep long n concode_elem_sep double[] productsSums concode_field_sep int hashCode concode_elem_sep RealMatrix getResult concode_elem_sep boolean equals concode_elem_sep void clear concode_elem_sep void increment
target: long function ( ) { return n ; }