string - Initialize a vector of vectors where not all vectors are of same size C++ -

i have data this.

static const double v1_arr={2,3,4} vector<double> v1_vec(v1_arr, v1_arr + sizeof(v1_arr[0]))  static const double v2_arr={9,6} vector<double> v2_vec(v2_arr, v2_arr + sizeof(v2_arr[0]))  static const double v3_arr={9,6,7,6} vector<double> v3_vec(v3_arr, v3_arr + sizeof(v3_arr[0])) 

how initialize vector of vectors v_v contains 3 above vectors?

if using compiler supports c++11 can do

vector<vector<double>> v_3{v1_vec, v2_vec, v3_vec}; 

if not have like

vector<vector<double>> v_3; v_3.push_back(v1_vec); v_3.push_back(v2_vec); v_3.push_back(v3_vec); 

note if can use c++11 features, can initialize other vectors this

vector<double> v1_vec{1.0, 2.0, 3.0}; 

and skip intermediate v1_arr.