Some polishing

nifty5/models/constant.py

@@ -20,9 +20,6 @@ from .model import Model
 
 class Constant(Model):
     """A sky model with a constant (multi-)field as value.
-       Since there is no model-function associated:
-        - Position has no influence on value.
-        - There is no gradient.
 
     Parameters
     ----------
@@ -30,6 +27,12 @@ class Constant(Model):
         The current position in parameter space.
     constant : Field
         The value of the model.
+
+    Note
+    ----
+    Since there is no model-function associated:
+        - Position has no influence on value.
+        - There is no gradient.
     """
     # TODO Remove position
     def __init__(self, position, constant):

nifty5/models/linear_model.py

@@ -32,11 +32,9 @@ class LinearModel(Model):
 
         Returns
         -------
-        Model
-            Model with linear Operator applied:
-                - Model.value = LinOp (inp.value) [key-wise]
-                - Gradient = LinOp * inp.gradient
-
+        Model with linear Operator applied:
+            - Model.value = LinOp (inp.value) [key-wise]
+            - Gradient = LinOp * inp.gradient
         """
         from ..operators.linear_operator import LinearOperator
         super(LinearModel, self).__init__(inp.position)

nifty5/models/local_nonlinearity.py

@@ -27,7 +27,7 @@ class LocalModel(Model):
         """
         Computes nonlinearity(inp)
             - LocalModel.value = nonlinearity(value) (pointwise)
-            - LocalModel.gradient = Outer Product
+            - LocalModel.gradient = Outer Product of gradients
 
         Parameters
         ----------

nifty5/models/multi_model.py

@@ -23,6 +23,7 @@ from .model import Model
 
 
 class MultiModel(Model):
+    """ """
     def __init__(self, model, key):
         # TODO Rewrite it such that it takes a dictionary as input. Just like MultiFields.
         super(MultiModel, self).__init__(model.position)

nifty5/models/variable.py

@@ -21,9 +21,12 @@ from .model import Model
 
 
 class Variable(Model):
-    """
-    Changes MultiField to be a Variable model.
-    Returns the MultiField.
+    """Changes (Multi-)Field to be a Variable model.
+
+    Parameters
+    ----------
+    position : Field or MultiField
+        The current position in parameter space.
     """
     def __init__(self, position):
         super(Variable, self).__init__(position)