fix: skip CI computation when cohort size is zero

adilraza99 · adilraza99 · commit 4113d9cd9d9b · 2026-03-02T17:56:36.000+05:30
diff --git a/malariagen_data/anoph/frq_base.py b/malariagen_data/anoph/frq_base.py
@@ -140,6 +140,9 @@ def _add_frequency_ci(*, ds, ci_method):
             frq_ci_low, frq_ci_upp = proportion_confint(
                 count=count, nobs=nobs, method=ci_method
             )
+        loc_zero = nobs == 0
+        frq_ci_low[loc_zero] = np.nan
+        frq_ci_upp[loc_zero] = np.nan
         ds["event_frequency_ci_low"] = ("variants", "cohorts"), frq_ci_low
         ds["event_frequency_ci_upp"] = ("variants", "cohorts"), frq_ci_upp
 

Original file line number	Diff line number	Diff line change
`@@ -140,6 +140,9 @@ def _add_frequency_ci(*, ds, ci_method):`
`140`	`140`	`frq_ci_low, frq_ci_upp = proportion_confint(`
`141`	`141`	`count=count, nobs=nobs, method=ci_method`
`142`	`142`	`)`
	`143`	`+ loc_zero = nobs == 0`
	`144`	`+ frq_ci_low[loc_zero] = np.nan`
	`145`	`+ frq_ci_upp[loc_zero] = np.nan`
`143`	`146`	`ds["event_frequency_ci_low"] = ("variants", "cohorts"), frq_ci_low`
`144`	`147`	`ds["event_frequency_ci_upp"] = ("variants", "cohorts"), frq_ci_upp`
`145`	`148`