bugfix for interpolate()

IAMconsortium · Jun 25, 2018 · d35444e · d35444e
1 parent b87cea5
commit d35444e
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/pyam/core.py b/pyam/core.py
@@ -215,12 +215,15 @@ def interpolate(self, year):
         """
         df = self.pivot_table(index=IAMC_IDX, columns=['year'],
                               values='value', aggfunc=np.sum)
+        # drop year-rows where values are already defined
+        if year in df.columns:
+            df = df[np.isnan(df[year])]
         fill_values = df.apply(fill_series,
                                raw=False, axis=1, year=year)
         fill_values = fill_values.dropna().reset_index()
         fill_values = fill_values.rename(columns={0: "value"})
         fill_values['year'] = year
-        self.data = self.data.append(fill_values)
+        self.data = self.data.append(fill_values, ignore_index=True)
 
     def as_pandas(self, with_metadata=False):
         """Return this as a pd.DataFrame