Set is_scale=True for time in _load_mat()

Author: t-sommer

src/sdf/dsres.py

@@ -147,6 +147,7 @@ def _load_mat(filename: str) -> Group:
                 unit=unit,
                 display_unit=display_unit,
                 data=data,
+                is_scale=True
             )
             ds_time = ds
         elif d == 1:

tests/test_sdf.py

@@ -288,6 +288,7 @@ def test_dsres_load_all(self):
         s = g["Time"]
         self.assertEqual(s.data.size, 552)
         # self.assertEqual(s.data.dtype, np.dtype(np.float32))
+        self.assertTrue(s.is_scale)
         self.assertEqual(s.unit, "s")
         self.assertEqual(s.comment, "Simulation time")