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add warning about perfectly correlated columns #117

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add warning about perfectly correlated columns #117

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9 changes: 6 additions & 3 deletions phik/bivariate.py
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Original file line number Diff line number Diff line change
Expand Up @@ -276,7 +276,10 @@ def phik_from_chi2(
elif chi2 >= chi2_max:
return 1.0

rho = optimize.brentq(
chi2_from_phik, 0, 1, args=(n, chi2, corr0, scale, sx, sy, pedestal), xtol=1e-5
)
try:
rho = optimize.brentq(
chi2_from_phik, 0, 1, args=(n, chi2, corr0, scale, sx, sy, pedestal), xtol=1e-5
)
except ValueError as e:
raise ValueError(f"{str(e)}. Your data might contain columns with perfect correlation")
return rho