plot_optimization_history()

A single objective study with 2-dimensional static search space

A single-objective study with 3-dimensional dynamic search space

A single objective study that suggests None as a categorical parameter

A single objective constraint optimization study

plotly's plot_optimization_history() is failed

pytorch_simple.py in optuna-example

Two single objective studies with 2-dimensional static search space

Two single objective studies with 3-dimensional dynamic search space