c++ filling matrix boost

Question

hi i've looked into the vector duplicate of this but couldn't find answer

ublas::matrix<int> input;
fill(input.begin1(), input.end1(), in_val);
fill(input.begin2(), input.end2(), in_val);

but it gives me

[2,3] {(3,3,3) (3,0,0)}

as you can guess i just want to fill all of it with init_val=3 , Thanks.

Answer 1

use http://www.boost.org/doc/libs/1_43_0/libs/numeric/ublas/doc/matrix.htm#scalar_matrix

you can also use array storage, matrix.data() which is range concept (began/end) directly, but I think it is not good idea in general