Data-treatment.md

-- [ ] add explanation for harvest convertion to yield
-
 # Monthly runoff
 - convert monthly runoff to annual by summing :  
 ```
@@ -44,3 +42,11 @@ grid_surface = np.zeros((len(latitudes),len(longitudes))) # dim [30,33]
                 for lon,longitude in enumerate(longitudes) :
                     grid_surface[lat][lon] = 110 * 110 * math.cos(math.pi*latitude/180) * 1/2 * 1/2 * 100 #in ha
 ```
+# Moving average
+```
+ma_harvest = []
+window = 10
+for y,year in enumerate(years[window:]):
+    ma_harvest.append(np.average(harvests_regions[id_region][y-window:y]))
+ma_harvest = np.asarray(ma_harvest)
+```