more flexible stat tendencies generation

src/anemoi/datasets/create/__init__.py

@@ -97,13 +97,14 @@ def patch(self, **kwargs):
 
         apply_patch(self.path, **kwargs)
 
-    def init_additions(self, delta=[1, 3, 6, 12, 24]):
+    def init_additions(self, delta=[1, 3, 6, 12, 24], statistics=True):
         from .loaders import StatisticsAddition
         from .loaders import TendenciesStatisticsAddition
         from .loaders import TendenciesStatisticsDeltaNotMultipleOfFrequency
 
-        a = StatisticsAddition.from_dataset(path=self.path, print=self.print)
-        a.initialise()
+        if statistics:
+            a = StatisticsAddition.from_dataset(path=self.path, print=self.print)
+            a.initialise()
 
         for d in delta:
             try:
@@ -112,13 +113,14 @@ def init_additions(self, delta=[1, 3, 6, 12, 24]):
             except TendenciesStatisticsDeltaNotMultipleOfFrequency:
                 self.print(f"Skipping delta={d} as it is not a multiple of the frequency.")
 
-    def run_additions(self, parts=None, delta=[1, 3, 6, 12, 24]):
+    def run_additions(self, parts=None, delta=[1, 3, 6, 12, 24], statistics=True):
         from .loaders import StatisticsAddition
         from .loaders import TendenciesStatisticsAddition
         from .loaders import TendenciesStatisticsDeltaNotMultipleOfFrequency
 
-        a = StatisticsAddition.from_dataset(path=self.path, print=self.print)
-        a.run(parts)
+        if statistics:
+            a = StatisticsAddition.from_dataset(path=self.path, print=self.print)
+            a.run(parts)
 
         for d in delta:
             try:
@@ -127,13 +129,14 @@ def run_additions(self, parts=None, delta=[1, 3, 6, 12, 24]):
             except TendenciesStatisticsDeltaNotMultipleOfFrequency:
                 self.print(f"Skipping delta={d} as it is not a multiple of the frequency.")
 
-    def finalise_additions(self, delta=[1, 3, 6, 12, 24]):
+    def finalise_additions(self, delta=[1, 3, 6, 12, 24], statistics=True):
         from .loaders import StatisticsAddition
         from .loaders import TendenciesStatisticsAddition
         from .loaders import TendenciesStatisticsDeltaNotMultipleOfFrequency
 
-        a = StatisticsAddition.from_dataset(path=self.path, print=self.print)
-        a.finalise()
+        if statistics:
+            a = StatisticsAddition.from_dataset(path=self.path, print=self.print)
+            a.finalise()
 
         for d in delta:
             try: