diff --git a/doc/Makefile b/doc/Makefile
index 7714bd5..82c73b1 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -8,4 +8,7 @@ html:
 	@echo ----------------
 	epydoc --html -o html/ ../fluents ../workflows 2> epydoc-html.log
 
+clean:
+	-rm -rf html
+	-rm epydoc-html.log
 
diff --git a/fluents/plots.py b/fluents/plots.py
index 2e9c123..13aa692 100644
--- a/fluents/plots.py
+++ b/fluents/plots.py
@@ -23,9 +23,19 @@ import scipy
 active_mode = 'default'
 
 class ObjectTable:
-    """A 2D table of elements."""
+    """A 2D table of elements.
+    An ObjectTable is a resizable two-dimensional array of objects.
+    When resized, it will keep all the elements that fit in the new shape,
+    and forget about other elements. When new elements are needed to fill
+    out the new shape, they will be created.
+    """
 
     def __init__(self, xsize=0, ysize=0, creator=None):
+        """Creates a two-dimensional table of objects.
+        @param xsize: Width of the object table.
+        @param ysize: Height of the object table.
+        @param creator: A function that will be used to instantiate new items.
+        """
         self._elements = []
         self._creator = creator or (lambda : None)
         self.xsize = xsize
@@ -33,7 +43,18 @@ class ObjectTable:
         self.resize(xsize, ysize)
 
     def resize(self, xsize, ysize):
-        """Resizes the table by removing and creating elements as required."""
+        """Resizes the table by removing and creating elements as required.
+        Makes the ObjectTable the specified size by removing elements that
+        will not fit in the new shape and appending elements to fill the
+        table. New elements will be created with the creator function passed
+        as an argument to __init__.
+
+        @param xsize: The new width.
+        @type xsize: int
+        @param ysize: The new height.
+        @type ysize: int
+        """
+
         # Delete or append new rows
         del self._elements[ysize:]
         new_rows = ysize - len(self._elements)