注意
跳转到末尾 下载完整示例代码。
plot_rank
- optuna.visualization.plot_rank(study, params=None, *, target=None, target_name='Objective Value')[源码]
将参数关系绘制为散点图,颜色表示目标值的排名。
注意,缺少指定参数的试验将不会被绘制。
- 参数:
- 返回:
一个
plotly.graph_objects.Figure
对象。- 返回类型:
Figure
注意
此函数需要 plotly >= 5.0.0。
以下代码片段展示了如何将参数关系绘制为排名图。
/home/docs/checkouts/readthedocs.org/user_builds/optuna/envs/stable/lib/python3.12/site-packages/optuna/_experimental.py:31: ExperimentalWarning:
Argument ``constraints_func`` is an experimental feature. The interface can change in the future.
import optuna
from plotly.io import show
def objective(trial):
x = trial.suggest_float("x", -100, 100)
y = trial.suggest_categorical("y", [-1, 0, 1])
c0 = 400 - (x + y) ** 2
trial.set_user_attr("constraint", [c0])
return x**2 + y
def constraints(trial):
return trial.user_attrs["constraint"]
sampler = optuna.samplers.TPESampler(seed=10, constraints_func=constraints)
study = optuna.create_study(sampler=sampler)
study.optimize(objective, n_trials=30)
fig = optuna.visualization.plot_rank(study, params=["x", "y"])
show(fig)
脚本总运行时间: (0 minutes 0.204 seconds)