test(fitfunctions): improve test quality and refactor combined_popt_psigma#416

Merged

blalterman merged 2 commits intomasterfrom

fix/fitfunctions-test-patterns

Jan 13, 2026

Commits on Jan 13, 2026

test(fitfunctions): fix anti-patterns and add matplotlib cleanup

blalterman
and
claude
committed
refactor(fitfunctions): return DataFrame from combined_popt_psigma

blalterman
and
claude
committed