ADD: inv.setInterRegionConstraint syntactic sugar directed to fop.reg…

…ionManager

pygimli/frameworks/inversion.py

@@ -394,8 +394,8 @@ def echoStatus(self):
         self.inv.echoStatus()
 
     def setPostStep(self, p):
-        """Set a function to be called after each iteration. 
-        
+        """Set a function to be called after each iteration.
+
         The function is called with p(IterationNumber, self)."""
         self._postStep = p
 
@@ -495,6 +495,19 @@ def setRegularization(self, *args, **kwargs):
         if len(kwargs) > 0:
             self.fop.setRegionProperties(*args, **kwargs)
 
+    def setInterRegionConstraint(self, region1, region2, strength):
+        """Set constraints between neighboring regions.
+
+        Parameters
+        ----------
+        region1, region2 : int|'*'
+            Region IDs
+        strength : float
+            weighting factor for roughness across regions
+        """
+        self.fop.regionManager().setInterRegionConstraint(
+            region1, region2, strength)
+
     def setConstraintWeights(self, cWeight):
         """Set weighting factors for the invidual rows of the C matrix."""
         self.inv.setCWeight(cWeight)