PRO merge_vector, v1, v2 ; merge two vectors (1-D) into one ; v1 will be replaced with the new merged vector ; n1 = n_elements(v1) n2 = n_elements(v2) v3 = make_array(n1+n2, type=size(v1,/type)) v3[0:n1-1] = v1 v3[n1:n1+n2-1] = v2 v1 = v3 END