egttools.plotting.plot_pairwise_comparison_rule_dynamics_in_simplex_without_roots

plot_pairwise_comparison_rule_dynamics_in_simplex_without_roots(population_size, beta, payoff_matrix=None, game=None, group_size=2, figsize=(10, 8), ax=None)[source]

Plot dynamics on the simplex under the pairwise comparison rule, without computing roots.

This version is faster and suited for visualization-only use cases. It skips root-finding and stability classification.

Parameters:

  • population_size (int) – Number of individuals in the population.

  • beta (float) – Strength of selection.

  • payoff_matrix (Optional[NDArray[np.float64]], default=None) – The game payoff matrix (used if game is not provided).

  • game (Optional[AbstractGame], default=None) – Game object. If not provided, one will be created from payoff_matrix.

  • group_size (Optional[int], default=2) – Number of players interacting simultaneously (used only if constructing a game).

  • figsize (Tuple[int, int], default=(10, 8)) – Size of the figure.

  • ax (Optional[plt.Axes], default=None) – Optional matplotlib axis to draw on.

Returns:

  • The Simplex2D plot object.

  • The gradient function (for use in trajectory plotting).

  • The AbstractGame object used.

  • The PairwiseComparison evolver instance.

Return type:

Tuple[Simplex2D, Callable, AbstractGame, PairwiseComparison]