diff --git a/viziphant/patterns.py b/viziphant/patterns.py
index 26a2afc..25c176d 100644
--- a/viziphant/patterns.py
+++ b/viziphant/patterns.py
@@ -399,6 +399,7 @@ def plot_patterns(spiketrains, patterns, circle_sizes=(3, 50, 70),
     axes.yaxis.set_label_coords(-0.01, 0.5)
     return axes
 
+# TODO: add a parameter node_size
 def plot_patterns_hypergraph(patterns, num_neurons=None):
     """
     Hypergraph visualization of spike patterns.
@@ -461,7 +462,7 @@ def plot_patterns_hypergraph(patterns, num_neurons=None):
         bst.rescale('ms')
         patterns = cell_assembly_detection(bst, max_lag=2)
 
-        fig = viziphant.patterns.plot_patterns_hypergraph(patterns)
+        viziphant.patterns.plot_patterns_hypergraph(patterns)
         plt.show()
 
     """
diff --git a/viziphant/patterns_src/view.py b/viziphant/patterns_src/view.py
index ff50c91..a440d7a 100644
--- a/viziphant/patterns_src/view.py
+++ b/viziphant/patterns_src/view.py
@@ -53,8 +53,8 @@ def __init__(self, hypergraphs, title=None):
         # Which color of the color map to use next
         self.current_color = 1
 
-        # Size of the vertices
-        self.node_radius = 0.2
+        # Size of the vertices TODO: add as parameter
+        self.node_radius = .2
 
         # Selected title of the figure
         self.title = title
@@ -225,8 +225,8 @@ def show(self,
         plot = self.dynamic_map * self.dynamic_map_edges
         # Set size of the plot to a square to avoid distortions
         self.plot = plot.redim.range(x=(-1, 11), y=(-1, 11))
-
-        axes = hv.render(plot, backend="matplotlib").axes[0]
+        # TODO: how to get axes? currently figure
+        axes = hv.render(plot, backend="matplotlib")
         return axes
 
     def draw_hyperedges(self,