Round mean values calculated during data analysis

Closes #201 (closed)

dan/datasets/analyze/statistics.py

@@ -37,19 +37,28 @@ def create_table(
 
     operations.extend(
         [
-            ("Min", np.min),
-            ("Max", np.max),
-            ("Mean", partial(np.mean, dtype=np.float16)),
-            ("Median", np.median),
+            ("Min", np.min, None),
+            ("Max", np.max, None),
+            ("Mean", np.mean, 2),
+            ("Median", np.median, None),
         ]
     )
     if total:
-        operations.append(("Total", np.sum))
+        operations.append(("Total", np.sum, None))
 
     statistics.add_rows(
         [
-            [col_name, *list(map(operator, data.values()))]
-            for col_name, operator in operations
+            [
+                col_name,
+                *list(
+                    map(
+                        # Round values if needed
+                        partial(round, ndigits=digits) if digits else lambda x: x,
+                        map(operator, data.values()),
+                    )
+                ),
+            ]
+            for col_name, operator, digits in operations
         ]
     )