Propagate cmin value in areatracker

Author: AntSimi

examples/10_tracking_diagnostics/pet_center_count.py

@@ -2,7 +2,8 @@
 Count center
 ============
 
-Do Geo stat with center and compare with frequency method show: :ref:`sphx_glr_python_module_10_tracking_diagnostics_pet_pixel_used.py`
+Do Geo stat with center and compare with frequency method
+show: :ref:`sphx_glr_python_module_10_tracking_diagnostics_pet_pixel_used.py`
 """
 import py_eddy_tracker_sample
 from matplotlib import pyplot as plt

examples/10_tracking_diagnostics/pet_pixel_used.py

@@ -2,7 +2,8 @@
 Count pixel used
 ================
 
-Do Geo stat with frequency and compare with center count method: :ref:`sphx_glr_python_module_10_tracking_diagnostics_pet_center_count.py`
+Do Geo stat with frequency and compare with center count
+method: :ref:`sphx_glr_python_module_10_tracking_diagnostics_pet_center_count.py`
 """
 import py_eddy_tracker_sample
 from matplotlib import pyplot as plt

src/py_eddy_tracker/featured_tracking/area_tracker.py

@@ -15,6 +15,11 @@ def __init__(self, *args, cmin=0.2, **kwargs):
         super().__init__(*args, **kwargs)
         self.cmin = cmin
 
+    def merge(self, *args, **kwargs):
+        eddies = super().merge(*args, **kwargs)
+        eddies.cmin = self.cmin
+        return eddies
+
     @classmethod
     def needed_variable(cls):
         vars = ["longitude", "latitude"]