Post-processing

In this example, we will discover the different functions of the API related to graphical post-processing of scenarios.

from __future__ import annotations

from gemseo.api import configure_logger
from gemseo.api import create_discipline
from gemseo.api import create_scenario
from gemseo.api import execute_post
from gemseo.api import get_available_post_processings
from gemseo.api import get_post_processing_options_schema
from gemseo.problems.sellar.sellar_design_space import SellarDesignSpace

configure_logger()

<RootLogger root (INFO)>

Get available DOE algorithms

The get_available_post_processings() function returns the list of post-processing algorithms available in GEMSEO or in external modules

print(get_available_post_processings())

['BasicHistory', 'Compromise', 'ConstraintsHistory', 'Correlations', 'GradientSensitivity', 'HighTradeOff', 'KMeans', 'MultiObjectiveDiagram', 'ObjConstrHist', 'OptHistoryView', 'ParallelCoordinates', 'ParetoFront', 'Petal', 'QuadApprox', 'Radar', 'RadarChart', 'Robustness', 'SOM', 'ScatterPareto', 'ScatterPlotMatrix', 'VariableInfluence']

Get options schema

For a given post-processing algorithm, e.g. "RadarChart", we can get the options; e.g.

print(get_post_processing_options_schema("RadarChart"))

{'$schema': 'http://json-schema.org/draft-04/schema', 'additionalProperties': False, 'type': 'object', 'properties': {'save': {'description': 'If True, save the figure.', 'type': 'boolean'}, 'show': {'description': 'If True, display the figure.', 'type': 'boolean'}, 'file_path': {'anyOf': [{'description': 'The path of the file to save the figures.\nIf the extension is missing, use ``file_extension``.\nIf None,\ncreate a file path\nfrom ``directory_path``, ``file_name`` and ``file_extension``.', 'type': 'string'}, {'description': 'The path of the file to save the figures.\nIf the extension is missing, use ``file_extension``.\nIf None,\ncreate a file path\nfrom ``directory_path``, ``file_name`` and ``file_extension``.', 'type': 'null'}]}, 'file_extension': {'anyOf': [{'description': "A file extension, e.g. 'png', 'pdf', 'svg', ...\nIf None, use a default file extension.", 'type': 'string'}, {'description': "A file extension, e.g. 'png', 'pdf', 'svg', ...\nIf None, use a default file extension.", 'type': 'null'}]}, 'file_name': {'anyOf': [{'description': 'The name of the file to save the figures.\nIf None, use a default one generated by the post-processing.', 'type': 'string'}, {'description': 'The name of the file to save the figures.\nIf None, use a default one generated by the post-processing.', 'type': 'null'}]}, 'directory_path': {'anyOf': [{'description': 'The path of the directory to save the figures.\nIf None, use the current working directory.', 'type': 'string'}, {'description': 'The path of the directory to save the figures.\nIf None, use the current working directory.', 'type': 'null'}]}, 'fig_size': {'anyOf': [{'type': 'null'}, {'minItems': 2, 'maxItems': 2, 'type': 'array', 'items': {'type': 'number'}}]}, 'iteration': {'anyOf': [{'type': 'integer'}, {'enum': ['opt'], 'type': 'string'}]}, 'constraint_names': {'anyOf': [{'type': 'null'}, {'type': 'array', 'items': {'minItems': 1, 'type': 'string'}}]}, 'show_names_radially': {'description': 'Whether to write the names of the constraints\nin the radial direction.\nOtherwise, write them horizontally.\nThe radial direction can be useful for a high number of constraints.', 'type': 'boolean'}}, 'required': []}

Post-process a scenario

The API function execute_post() can generate visualizations of the optimization or DOE results. For that, it consider the object to post-process to_post_proc, the post processing post_name with its **options. E.g.

disciplines = create_discipline(["Sellar1", "Sellar2", "SellarSystem"])
design_space = SellarDesignSpace()
scenario = create_scenario(disciplines, "MDF", "obj", design_space, "SellarMDFScenario")
scenario.execute({"algo": "NLOPT_SLSQP", "max_iter": 100})
execute_post(scenario, "OptHistoryView", save=False, show=True)

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/home/docs/checkouts/readthedocs.org/user_builds/gemseo/envs/stable/lib/python3.9/site-packages/gemseo/algos/design_space.py:458: ComplexWarning: Casting complex values to real discards the imaginary part
  self.__current_value[name] = array_value.astype(
    INFO - 16:38:09:
    INFO - 16:38:09: *** Start SellarMDFScenario execution ***
    INFO - 16:38:09: SellarMDFScenario
    INFO - 16:38:09:    Disciplines: Sellar1 Sellar2 SellarSystem
    INFO - 16:38:09:    MDO formulation: MDF
    INFO - 16:38:09: Optimization problem:
    INFO - 16:38:09:    minimize obj(x_local, x_shared)
    INFO - 16:38:09:    with respect to x_local, x_shared
    INFO - 16:38:09:    over the design space:
    INFO - 16:38:09:    +-------------+-------------+-------+-------------+-------+
    INFO - 16:38:09:    | name        | lower_bound | value | upper_bound | type  |
    INFO - 16:38:09:    +-------------+-------------+-------+-------------+-------+
    INFO - 16:38:09:    | x_local     |      0      |   1   |      10     | float |
    INFO - 16:38:09:    | x_shared[0] |     -10     |   4   |      10     | float |
    INFO - 16:38:09:    | x_shared[1] |      0      |   3   |      10     | float |
    INFO - 16:38:09:    +-------------+-------------+-------+-------------+-------+
    INFO - 16:38:09: Solving optimization problem with algorithm NLOPT_SLSQP:
    INFO - 16:38:09: ...   0%|          | 0/100 [00:00<?, ?it]
    INFO - 16:38:09: ...   1%|          | 1/100 [00:00<00:02, 34.72 it/sec, obj=21.8+j]
    INFO - 16:38:09: ...   2%|▏         | 2/100 [00:00<00:03, 28.20 it/sec, obj=101+j]
    INFO - 16:38:09: ...   3%|▎         | 3/100 [00:00<00:02, 42.07 it/sec, obj=4.79+j]
 WARNING - 16:38:09: MDAJacobi has reached its maximum number of iterations but the normed residual 0.021417306370533573 is still above the tolerance 1e-06.
    INFO - 16:38:09: ...   4%|▍         | 4/100 [00:00<00:03, 27.91 it/sec, obj=0.827-.151j]
    INFO - 16:38:09: ...   5%|▌         | 5/100 [00:00<00:02, 32.38 it/sec, obj=3.19+j]
    INFO - 16:38:09: ...   6%|▌         | 6/100 [00:00<00:02, 38.77 it/sec, obj=0.571+j]
    INFO - 16:38:09: ...   7%|▋         | 7/100 [00:00<00:02, 33.37 it/sec, obj=0.535+j]
    INFO - 16:38:09: ...   8%|▊         | 8/100 [00:00<00:02, 34.50 it/sec, obj=0.528-3.7e-9j]
    INFO - 16:38:09: ...   9%|▉         | 9/100 [00:00<00:02, 35.43 it/sec, obj=0.527+j]
    INFO - 16:38:09: ...  10%|█         | 10/100 [00:00<00:02, 36.26 it/sec, obj=0.527+j]
    INFO - 16:38:09: ...  11%|█         | 11/100 [00:00<00:02, 38.34 it/sec, obj=0.527+j]
    INFO - 16:38:09: ...  12%|█▏        | 12/100 [00:00<00:02, 41.77 it/sec, obj=0.527+j]
    INFO - 16:38:10: ...  13%|█▎        | 13/100 [00:00<00:01, 43.67 it/sec, obj=0.527+j]
    INFO - 16:38:10: ...  14%|█▍        | 14/100 [00:00<00:01, 45.42 it/sec, obj=0.527+j]
    INFO - 16:38:10: ...  15%|█▌        | 15/100 [00:00<00:01, 43.89 it/sec, obj=Not evaluated]
    INFO - 16:38:10: Optimization result:
    INFO - 16:38:10:    Optimizer info:
    INFO - 16:38:10:       Status: None
    INFO - 16:38:10:       Message: Successive iterates of the objective function are closer than ftol_rel or ftol_abs. GEMSEO Stopped the driver
    INFO - 16:38:10:       Number of calls to the objective function by the optimizer: 18
    INFO - 16:38:10:    Solution:
    INFO - 16:38:10:       Objective: (0.5272881448154496+0j)
    INFO - 16:38:10:       Design space:
    INFO - 16:38:10:       +-------------+-------------+-----------------------+-------------+-------+
    INFO - 16:38:10:       | name        | lower_bound |         value         | upper_bound | type  |
    INFO - 16:38:10:       +-------------+-------------+-----------------------+-------------+-------+
    INFO - 16:38:10:       | x_local     |      0      | 2.938599008285442e-13 |      10     | float |
    INFO - 16:38:10:       | x_shared[0] |     -10     |   0.581646121057025   |      10     | float |
    INFO - 16:38:10:       | x_shared[1] |      0      | 1.421009702353169e-15 |      10     | float |
    INFO - 16:38:10:       +-------------+-------------+-----------------------+-------------+-------+
    INFO - 16:38:10: *** End SellarMDFScenario execution (time: 0:00:00.355210) ***

<gemseo.post.opt_history_view.OptHistoryView object at 0x7fc20f3f8af0>