feat(fitfunctions): add hinge, composite, and Heaviside fit functions#422

Merged

blalterman merged 10 commits intomasterfrom

feature/hinge-saturation-fitfunction

Jan 21, 2026

Commits on Jan 21, 2026

fix(fitfunctions): catch FitFailedError in make_fit when return_exception=True

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feat(fitfunctions): add HingeSaturation class for saturation modeling

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test(fitfunctions): add tests for hinge piecewise linear functions

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test(fitfunctions): add tests for Gaussian-Heaviside composite functions

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test(fitfunctions): add tests for HeavySide step function

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feat(fitfunctions): add hinge piecewise linear functions

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feat(fitfunctions): add Gaussian-Heaviside composite functions

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feat(fitfunctions): add HeavySide step function

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docs(fitfunctions): add module-specific contribution guide

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style(fitfunctions): apply Black formatting to source and test files

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