Pull request overview

This PR adds weighted frequency computation to the frequency command through a new --weight flag. Users can now compute frequencies where each row contributes a weight value instead of a count of 1, enabling use cases like analyzing survey responses with importance weights or aggregating pre-counted data.

Key Changes:

• Added --weight <column> flag to specify a numeric weight column
• Weight column is automatically excluded from frequency computation
• Missing/invalid weights default to 1.0; zero and negative weights are ignored
• Both sequential and parallel processing paths support weighted frequencies

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 6 comments.

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 11 comments.

        let mapped_unique_headers: Vec<usize> = all_unique_headers_vec
            .iter()
            .filter_map(|&original_idx| {
                // Find the position of this original index in the selection
                sel.iter().position(|&sel_idx| sel_idx == original_idx)
            })
            .collect();

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.