[postprocessor] [refactoring] Add radial_centers rule (issue #8)

postprocessor.py

@@ -926,6 +926,11 @@ class PostProcessor(HDF5Container):
         rad_bins = np.concatenate(([0.0], rad_bins, [rad_of_box]))
         return rad_bins
 
+    def _radial_centers(self, ax_los="z"):
+        radial_bins = self.save.get_node("/radial/radial_bins_" + ax_los).read()
+        bin_centers = 0.5 * (radial_bins[1:] + radial_bins[:-1])
+        return bin_centers
+
     def _rr(self, ax_los="z"):
         """
         Computes the radius from the center
@@ -1483,7 +1488,19 @@ class PostProcessor(HDF5Container):
                 },
             ),
             # Helpers
-            "radial_bins": Rule(self, self._radial_bins, "Radial bins", "/radial"),
+            "radial_bins": Rule(
+                self,
+                self._radial_bins,
+                "Radial bins",
+                "/radial",
+            ),
+            "radial_centers": Rule(
+                self,
+                self._radial_centers,
+                "Centers of radial bins",
+                "/radial",
+                dependencies=["radial_bins"],
+            ),
             "rr": Rule(self, self._rr, "Coordinate map", "/maps"),
             "bins_on_map": Rule(
                 self,
@@ -1634,7 +1651,7 @@ class PostProcessor(HDF5Container):
                 partial(self._rad_avg, name),
                 "Azimuthal average of {}".format(name),
                 "/radial",
-                dependencies=["radial_bins", "bins_on_map", name],
+                dependencies=["radial_centers", "bins_on_map", name],
             )
 
             self.rules["avg_map_" + name] = Rule(
@@ -1642,7 +1659,7 @@ class PostProcessor(HDF5Container):
                 partial(self._rad_avg_map, name),
                 "Interpolated map of azimuthal average of {}".format(name),
                 "/maps",
-                dependencies=["radial_bins", "bins_on_map", "rr", "rad_avg_" + name],
+                dependencies=["radial_centers", "bins_on_map", "rad_avg_" + name],
             )
             self.rules["fluct_" + name] = Rule(
                 self,