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52 changes: 0 additions & 52 deletions
52
fedot_ind/core/operation/implementation/basis/data_driven.py
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Original file line number | Diff line number | Diff line change |
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from typing import Tuple, TypeVar, Optional | ||
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import numpy as np | ||
from fedot.core.operations.operation_parameters import OperationParameters | ||
from pymonad.either import Either | ||
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from fedot_ind.core.operation.decomposition.SpectrumDecomposition import SpectrumDecomposer | ||
from fedot_ind.core.operation.implementation.basis.abstract_basis import BasisDecompositionImplementation | ||
from fedot_ind.core.operation.transformation.data.hankel import HankelMatrix | ||
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class_type = TypeVar("T", bound="DataDrivenBasis") | ||
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class DataDrivenBasisImplementation(BasisDecompositionImplementation): | ||
"""DataDriven basis | ||
Example: | ||
ts1 = np.random.rand(200) | ||
ts2 = np.random.rand(200) | ||
ts = [ts1, ts2] | ||
bss = DataDrivenBasisImplementation({'n_components': 3, 'window_size': 30}) | ||
basis_multi = bss._transform(ts) | ||
basis_1d = bss._transform(ts1) | ||
""" | ||
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def __init__(self, params: Optional[OperationParameters] = None): | ||
super().__init__(params) | ||
self.n_components = params.get('n_components') | ||
self.window_size = params.get('window_size') | ||
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self.decomposer = None | ||
self.basis = None | ||
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def _transform_one_sample(self, series: np.array): | ||
trajectory_transformer = HankelMatrix(time_series=series, window_size=self.window_size) | ||
data = trajectory_transformer.trajectory_matrix | ||
self.ts_length = trajectory_transformer.ts_length | ||
self.decomposer = SpectrumDecomposer(data, self.n_components, self.ts_length) | ||
return self._get_basis(data) | ||
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def _get_1d_basis(self, data): | ||
basis = Either.insert(data).then(self.decomposer.svd).then(self.decomposer.threshold).then( | ||
self.decomposer.data_driven_basis).value[0] | ||
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return np.swapaxes(basis, 1, 0) | ||
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def _get_multidim_basis(self, data): | ||
basis = np.array( | ||
Either.insert(data).then(self.decomposer.tensor_decomposition).then(self.decomposer.multi_threshold).then( | ||
self.decomposer.data_driven_basis).value[0]) | ||
basis = basis.reshape(basis.shape[1], -1) | ||
return basis | ||
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