Note
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Simple disciplinary DOE example on the Sobieski SSBJ test case¶
from gemseo.api import configure_logger
from gemseo.api import create_discipline
from gemseo.api import create_scenario
from gemseo.problems.sobieski.core.problem import SobieskiProblem
from matplotlib import pyplot as plt
configure_logger()
Out:
<RootLogger root (INFO)>
Instantiate the discipline¶
discipline = create_discipline("SobieskiMission")
Create the design space¶
design_space = SobieskiProblem().design_space
design_space.filter(["y_24", "y_34"])
Out:
<gemseo.algos.design_space.DesignSpace object at 0x7fdbe0d70e50>
Create the scenario¶
Build scenario which links the disciplines with the formulation and The DOE algorithm.
scenario = create_scenario(
[discipline],
formulation="DisciplinaryOpt",
objective_name="y_4",
design_space=design_space,
maximize_objective=True,
scenario_type="DOE",
)
Execute the scenario¶
Here we use a latin hypercube sampling algorithm with 30 samples.
scenario.execute({"n_samples": 30, "algo": "lhs"})
Out:
INFO - 10:06:56:
INFO - 10:06:56: *** Start DOEScenario execution ***
INFO - 10:06:56: DOEScenario
INFO - 10:06:56: Disciplines: SobieskiMission
INFO - 10:06:56: MDO formulation: DisciplinaryOpt
INFO - 10:06:56: Optimization problem:
INFO - 10:06:56: minimize -y_4(y_24, y_34)
INFO - 10:06:56: with respect to y_24, y_34
INFO - 10:06:56: over the design space:
INFO - 10:06:56: +------+-------------+------------+-------------+-------+
INFO - 10:06:56: | name | lower_bound | value | upper_bound | type |
INFO - 10:06:56: +------+-------------+------------+-------------+-------+
INFO - 10:06:56: | y_24 | 0.44 | 4.15006276 | 11.13 | float |
INFO - 10:06:56: | y_34 | 0.44 | 1.10754577 | 1.98 | float |
INFO - 10:06:56: +------+-------------+------------+-------------+-------+
INFO - 10:06:56: Solving optimization problem with algorithm lhs:
INFO - 10:06:56: ... 0%| | 0/30 [00:00<?, ?it]
INFO - 10:06:56: ... 100%|██████████| 30/30 [00:00<00:00, 1761.01 it/sec, obj=-2.73e+3]
INFO - 10:06:56: Optimization result:
INFO - 10:06:56: Optimizer info:
INFO - 10:06:56: Status: None
INFO - 10:06:56: Message: None
INFO - 10:06:56: Number of calls to the objective function by the optimizer: 30
INFO - 10:06:56: Solution:
INFO - 10:06:56: Objective: -2726.3660548732214
INFO - 10:06:56: Design space:
INFO - 10:06:56: +------+-------------+--------------------+-------------+-------+
INFO - 10:06:56: | name | lower_bound | value | upper_bound | type |
INFO - 10:06:56: +------+-------------+--------------------+-------------+-------+
INFO - 10:06:56: | y_24 | 0.44 | 9.094543945649603 | 11.13 | float |
INFO - 10:06:56: | y_34 | 0.44 | 0.4769766573300308 | 1.98 | float |
INFO - 10:06:56: +------+-------------+--------------------+-------------+-------+
INFO - 10:06:56: *** End DOEScenario execution (time: 0:00:00.025205) ***
{'eval_jac': False, 'algo': 'lhs', 'n_samples': 30}
Plot optimization history view¶
scenario.post_process("OptHistoryView", save=False, show=False)
Out:
<gemseo.post.opt_history_view.OptHistoryView object at 0x7fdbe0b37940>
Plot parallel coordinates¶
scenario.post_process(
"ScatterPlotMatrix", save=False, show=False, variable_names=["y_4", "y_24", "y_34"]
)
# Workaround for HTML rendering, instead of ``show=True``
plt.show()
Total running time of the script: ( 0 minutes 1.200 seconds)