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feat: extract intensity components (#244)
* docs: write Result class step 1 to JSON * fix: change plot title to SciPy * refactor: only emit warning when over-defining parameters
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| """Extract physics info from data and fit output.""" | ||
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| from typing import Iterable, Sequence, Union | ||
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| import sympy as sp | ||
| from expertsystem.amplitude.helicity import HelicityModel | ||
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| from tensorwaves.model import LambdifiedFunction, SympyModel | ||
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| def add_components( | ||
| model: HelicityModel, | ||
| components: Union[str, Iterable[str]], | ||
| ) -> sp.Expr: | ||
| """Coherently or incoherently add components of a helicity model.""" | ||
| if isinstance(components, str): | ||
| components = [components] | ||
| for component in components: | ||
| if component not in model.components: | ||
| raise KeyError( | ||
| f'Component "{component}" not in model components', | ||
| list(model.components), | ||
| ) | ||
| if any(map(lambda c: c.startswith("I"), components)) and any( | ||
| map(lambda c: c.startswith("A"), components) | ||
| ): | ||
| intensity_sum = add_components( | ||
| model, | ||
| components=filter(lambda c: c.startswith("I"), components), | ||
| ) | ||
| amplitude_sum = add_components( | ||
| model, | ||
| components=filter(lambda c: c.startswith("A"), components), | ||
| ) | ||
| return intensity_sum + amplitude_sum | ||
| if all(map(lambda c: c.startswith("I"), components)): | ||
| return sum(model.components[c] for c in components) | ||
| if all(map(lambda c: c.startswith("A"), components)): | ||
| return abs(sum(model.components[c] for c in components)) ** 2 | ||
| raise ValueError('Not all component names started with either "A" or "I"') | ||
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| def create_intensity_component( | ||
| model: HelicityModel, | ||
| components: Union[str, Sequence[str]], | ||
| backend: str, | ||
| ) -> LambdifiedFunction: | ||
| """Create a `.LambdifiedFunction` of a sum of helicity model components.""" | ||
| added_components = add_components(model, components) | ||
| sympy_model = SympyModel( | ||
| expression=added_components, | ||
| parameters=model.parameters, | ||
| ) | ||
| return LambdifiedFunction(sympy_model, backend=backend) |
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