fixes cash_flow problem

spjuhel · spjuhel · commit a68b79a1446e · 2025-09-25T16:07:26.000+02:00
diff --git a/climada/trajectories/trajectory.py b/climada/trajectories/trajectory.py
@@ -204,9 +204,8 @@ def _calc_npv_cash_flows(
         )
         tmp.index = df.index
         df = tmp.copy()
-        start = pd.Timestamp(start_date)
         df["discount_factor"] = (1 / (1 + df["rate"])) ** (
-            (df.index - start).days // 365
+            (df.index.year - start_date.year)
         )
 
         # Apply the discount factors to the cash flows

Original file line number	Diff line number	Diff line change
`@@ -204,9 +204,8 @@ def _calc_npv_cash_flows(`
`204`	`204`	`)`
`205`	`205`	`tmp.index = df.index`
`206`	`206`	`df = tmp.copy()`
`207`		`- start = pd.Timestamp(start_date)`
`208`	`207`	`df["discount_factor"] = (1 / (1 + df["rate"])) ** (`
`209`		`- (df.index - start).days // 365`
	`208`	`+ (df.index.year - start_date.year)`
`210`	`209`	`)`
`211`	`210`
`212`	`211`	`# Apply the discount factors to the cash flows`