How to add two columns?

[newtonharry]

Hi,

Sorry for the simple question, but I'm having a hard time trying to add two columns in a csc matrix. Here is my current naive approach as I'm having a hard time trying to understand the API:

let mut acc: CsVec<i64> = CsVec::empty(matrix.rows());

for col_vec in matrix.outer_iterator() {
  col_vec.iter().for_each(|(row_ind, value)| {
      *acc.get_mut(row_ind).unwrap_or(&mut 0) += value;
  });
}

[mulimoen]

Does this do what you expect?

let mut acc: CsVec<i64> = CsVec::empty(matrix.rows());

for col_vec in matrix.outer_iterator() {
  acc = acc + col_vec;
}

There is no add_assign since addition might change the sparse structure of the vector.

[newtonharry]

This worked, thanks!