Enforce zeros in self.matrix when reading O-Format which might not have values for all cells

Author: MaxBo

matrixconverters/src/matrixconverters/_version.py

@@ -1 +1 @@
-__version__ = '1.0.3'
+__version__ = '1.1.0'

matrixconverters/src/matrixconverters/read_ptv.py

@@ -172,7 +172,7 @@ def create_matrix(self,
         origins = self.zone_no
         destinations = getattr(self, 'zone_no2', origins)
         self['matrix'] = xr.DataArray(
-            np.empty((n_zones, n_cols), dtype=dtype),
+            np.zeros((n_zones, n_cols), dtype=dtype),
             coords=(origins, destinations),
             dims=('origins', 'destinations'),
             name='matrix',)