Function tournament_select 

pub fn tournament_select<B: Backend>(
    population: &Tensor<B, 2>,
    fitness: &[f32],
    tournament_size: usize,
    n_winners: usize,
    rng: &mut dyn Rng,
    device: &<B as BackendTypes>::Device,
) -> Tensor<B, 2>

Gathers n_winners rows out of a population tensor by tournament.

Convenience wrapper that runs tournament_indices_host on the host and then performs a single Tensor::select gather on the device. The returned tensor has shape (n_winners, genome_dim).

population must have shape (N, D) where N matches fitness.len(). tournament_size and n_winners are forwarded directly to tournament_indices_host.

Panics

Inherits the panic conditions of tournament_indices_host: fitness.is_empty() or tournament_size < 2.