Abstract This package provides an Optuna parallel coordinate plot using Piecewise Cubic Hermite Interpolating Polynomials (Pchip) for smooth, monotonic curves. This reduces visual clutter and makes individual trial trajectories easier to track in high-dimensional spaces compared to standard straight-line plots.
APIs plot_curved_parallel_coordinate(study: optuna.Study, params: list[str] | None = None, points_per_segment: int = 50) -> plotly.graph_objects.Figure study: The optuna.Study object (plots completed trials only). params: List of parameter names to plot. Defaults to all parameters.