Detrender Base Class & PolynomialDetrender Modifications

[chukarsten]

Adding the abstract, base Detrender class and made the PolynomialDetrender inherit from it. Also enhanced the PolynomialDetrender with a new get_trend_df() function to decompose the target signal into trend, seasonality and residual.

[codecov[bot]]

Codecov Report

Merging #3599 (28c5ee6) into main (b60eab3) will decrease coverage by 79.6%. The diff coverage is 16.3%.

@@           Coverage Diff            @@
##            main   #3599      +/-   ##
========================================
- Coverage   99.7%   20.1%   -79.5%     
========================================
  Files        339     340       +1     
  Lines      34386   34687     +301     
========================================
- Hits       34254    6968   -27286     
- Misses       132   27719   +27587     

Impacted Files	Coverage Δ
evalml/pipelines/component_graph.py	64.0% <ø> (-35.7%)	:arrow_down:
evalml/pipelines/components/__init__.py	100.0% <ø> (ø)
...alml/pipelines/components/transformers/__init__.py	100.0% <ø> (ø)
evalml/pipelines/pipeline_base.py	59.2% <ø> (-39.3%)	:arrow_down:
...sts/decomposer_tests/test_polynomial_decomposer.py	0.0% <0.0%> (ø)
evalml/tests/component_tests/test_components.py	0.0% <0.0%> (-99.0%)	:arrow_down:
evalml/tests/component_tests/test_utils.py	0.0% <ø> (-99.0%)	:arrow_down:
.../tests/pipeline_tests/test_time_series_pipeline.py	0.0% <0.0%> (-99.8%)	:arrow_down:
...ransformers/preprocessing/polynomial_decomposer.py	28.9% <28.9%> (ø)
evalml/tests/conftest.py	33.5% <37.5%> (-64.5%)	:arrow_down:
... and 286 more

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[chukarsten]

Closing in favor of the rebased PR https://github.com/alteryx/evalml/pull/3720