one_at_a_time

dsa.one_at_a_time(base, ranges)

Vary each parameter in ranges in turn, holding the rest at base.

The union of one-way sweeps, with the base case included once as its own scenario. This is the design a tornado diagram reads.

Parameters

Name	Type	Description	Default
base	pd.Series	Point values of every parameter, indexed by name.	required
ranges	Mapping[str, Sequence[float]]	Maps a parameter name to the values to sweep it over (a (low, high) pair or any longer sequence).	required

Returns

Name	Type	Description
	Design	A (design, descriptor) pair with 1 + sum(len(v)) scenarios: the
	Design	base case first, then each parameter’s sweep. The descriptor names the
	Design	single parameter each scenario varies and its value.

Example

import pandas as pd from heormodel.dsa import one_at_a_time base = pd.Series({“a”: 1.0, “b”: 2.0}) design, descriptor = one_at_a_time(base, {“a”: (0.5, 1.5), “b”: (1.0, 3.0)}) len(design) 5 descriptor[“scenario”].tolist() [‘(base)’, ‘a=0.5’, ‘a=1.5’, ‘b=1’, ‘b=3’]