vector< vector< double > > newValues( field->_comp_values.size() );
size_t iFromSub = 0, iNewSub = 0, iNewComp = 0;
for ( ; iFromSub < field->_sub.size(); iFromSub += groups.size() )
vector< vector< double > > newValues( field->_comp_values.size() );
size_t iFromSub = 0, iNewSub = 0, iNewComp = 0;
for ( ; iFromSub < field->_sub.size(); iFromSub += groups.size() )