inferdynamic's Introduction

InferDynamic

Infer a dynamic system

Overview

We presented three methods for black-box identification of switched nonlinear dynamical systems from trajectory data, and proposed a way to evaluate an inferred model by comparison to the original model. Using this evaluation, we tested the three methods for robustness and compared them on five classes of 20 examples in total.

Installation & Usage

Prerequisite

Python 3.7 with libraries SciPy, scikit-learn and LIBSVM

Installation

Just download. We have tested on an 1.8GHz Intel Core-i7 8550U processor with 8GB RAM running 64-bit Windows

Usage

Run run_tests.py

Output

Each row of results represents an experiment on a system and these components are respectively 'the variant ID' , 'the example ID', 'number of initial points', 'time step size', 'interval of simulation', 'the absolute error tolerance in Method 2', 'average relative distances using Method 1, Method 2, and Method 3' and 'wall-clock inference time in seconds using Method 1, Method 2, and Method 3'.

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inferdynamic's Issues

Cannot run run_test in run_tests.py

Hello,
I am trying to run the function run_test you provide in the run_tests.py file to explore your code and comparisons between dbscan, tolmerge, and piecelinear methods, however, I am stumbling upon an error in the SVM classification problem.
I uncommented the lines 478, 483, and 488 of the file run_tests.py to preserve the signature you provide to use run_test.

The error I'm getting is the following:

Traceback (most recent call last):
  File "/Users/dk/Documents/git-repos/InferDynamic/run_tests.py", line 478, in <module>
    run_test(i+1, 'A', i, methods=['dbscan','tolmerge', 'piecelinear'])
  File "/Users//Documents/git-repos/InferDynamic/run_tests.py", line 116, in run_test
    P, G, boundary = infer_model(
  File "/Users/dk/Documents/git-repos/InferDynamic/infer_multi_ch.py", line 2426, in infer_model
    coeffs = svm_classify(P, Y, L_y, boundary_order, num_mode)
  File "/Users/dk/Documents/git-repos/InferDynamic/infer_multi_ch.py", line 1719, in svm_classify
    return get_coeffs(m, order=boundary_order)
  File "/Users/dk/Documents/git-repos/InferDynamic/infer_multi_ch.py", line 1683, in get_coeffs
    list_a[d] += svc[i][0] * 0.5 * sv[i][d+1]
KeyError: 3

I am running on macOS Montery 12.5.1 with Python 3.9.10. I have all the dependency libraries you mention installed.

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