xgboost_sys

Function XGDMatrixSetGroup

Source 
pub unsafe extern "C" fn XGDMatrixSetGroup(
    handle: DMatrixHandle,
    group: *const c_uint,
    len: bst_ulong,
) -> c_int
Expand description

\brief set label of the training matrix \param handle a instance of data matrix \param group pointer to group size \param len length of array \return 0 when success, -1 when failure happens