diff --git a/system/plots.py b/system/plots.py
index 414102b..45add9c 100644
--- a/system/plots.py
+++ b/system/plots.py
@@ -479,16 +479,12 @@ class ScatterPlot(Plot):
         assert y1<=y2
 
         index = scipy.nonzero((xdata>x1) & (xdata<x2) & (ydata>y1) & (ydata<y2))
-        print 'index:', index
-        print 'current_dim', self.current_dim
 
         ids = self.dataset_1.get_identifiers(self.current_dim, index)
-        print 'ids', ids
         self.selection_listener(self.current_dim, ids)
 
     def selection_changed(self, selection):
         ids = selection[self.current_dim] # current identifiers
-        print 'ids: ', ids
          
         index = self.dataset_1.get_indices(self.current_dim, ids)
         xdata_new = scipy.take(self.xaxis_data, index) #take data
@@ -499,10 +495,10 @@ class ScatterPlot(Plot):
         self.canvas.draw()
 
 class NetworkPlot(Plot):
-    def __init__(self, graph, **kw):
+    def __init__(self, dataset, **kw):
         # Set member variables and call superclass' constructor
-        self.graph = graph.asnetworkx()
-        self.dataset = graph
+        self.graph = dataset.asnetworkx()
+        self.dataset = dataset 
         self.keywords = kw
         self.dim_name = self.dataset.get_dim_name(0)
 
@@ -515,17 +511,27 @@ class NetworkPlot(Plot):
         Plot.__init__(self, kw['name'])
 
         # Keep node size and color as dicts for fast lookup
+        self.node_size = {}
         if kw.has_key('node_size') and cb.iterable(kw['node_size']):
             kw.remove('node_size')
-            self.node_size = {}
             for id, size in zip(self.dataset[self.dim_name], kw['node_size']):
                 self.node_size[id] = size
+        else:
+            for id in dataset[self.dim_name]:
+                self.node_size[id] = 40
                 
+        self.node_color = {}
         if kw.has_key('node_color') and cb.iterable(kw['node_color']):
             kw.remove('node_color')
-            self.node_color = {}
             for id, color in zip(self.dataset[self.dim_name], kw['node_color']):
                 self.node_color[id] = color
+        else:
+            self.node_color = None
+#            for id in self.dataset[self.dim_name]:
+#                self.node_color[id] = 'red'
+
+        if kw.has_key('node_color'):
+            kw.pop('node_color')
 
         # FIXME: What is figsize?
         self.fig = Figure(figsize=(5, 4), dpi=72)
@@ -568,29 +574,38 @@ class NetworkPlot(Plot):
             x1, x2 = x2, x1
         if y1 > y2:
             y1, y2 = y2, y1
-        index = scipy.nonzero((xdata<x1) & (xdata>x2) & (ydata>y1) & (ydata<y2))
+        index = scipy.nonzero((xdata>x1) & (xdata<x2) & (ydata>y1) & (ydata<y2))
 
         ids = [node_ids[i] for i in index]
         self.selection_listener(self.dataset.get_dim_name(0), ids)
 
     def selection_changed(self, selection):
         ids = selection[self.dataset.get_dim_name(0)] # current identifiers
-        selected_nodes = list(ids.intersection(set(self.graph.nodes())))
-        unselected_nodes = list(ids.difference(selected_nodes))
+        node_set = set(self.graph.nodes())
 
-        unselected_colors = [self.node_color[x] for x in unselected_nodes]
-        unselected_sizes = [self.node_size[x] for x in unselected_nodes]
-        selected_sizes = [self.node_size[x] for x in selected_nodes]
+        selected_nodes = list(ids.intersection(node_set))
+        unselected_nodes = list(node_set.difference(ids))
+
+        if self.node_color:
+            unselected_colors = [self.node_color[x] for x in unselected_nodes]
+        else:
+            unselected_colors = 'red'
+
+        if self.node_size:
+            unselected_sizes = [self.node_size[x] for x in unselected_nodes]
+            selected_sizes = [self.node_size[x] for x in selected_nodes]
 
         self.ax.clear()
         networkx.draw_networkx_edges(self.graph, edge_list=self.graph.edges(), \
             ax=self.ax, **self.keywords)
         
-        networkx.draw_networkx_nodes(self.graph, self.keywords['pos'], node_list=unselected_nodes, \
-            node_color=unselected_colors, node_size=unselected_sizes, ax=self.ax, *kw)
+        if unselected_nodes:
+            networkx.draw_networkx_nodes(self.graph, nodelist=unselected_nodes, \
+                node_color='r', node_size=unselected_sizes, ax=self.ax, **self.keywords)
 
-        networkx.draw_networkx_nodes(self.graph, self.keywords['pos'], node_list=selected_nodes, \
-            node_color='black', node_size=selected_sizes, ax=self.ax, *kw)
+        if selected_nodes:
+            networkx.draw_networkx_nodes(self.graph, nodelist=selected_nodes, \
+             node_color='k', node_size=selected_sizes, ax=self.ax, **self.keywords)
         
         self.canvas.draw()
 
diff --git a/workflows/test_workflow.py b/workflows/test_workflow.py
index 6aa145a..616bce7 100644
--- a/workflows/test_workflow.py
+++ b/workflows/test_workflow.py
@@ -108,7 +108,6 @@ class TestDataFunction(workflow.Function):
         for x in 'ABCDEF':
             for y in 'ADE':
                 graph.add_edge(x, y, 3)
-        print networkx.adj_matrix(graph)
         ds = dataset.GraphDataset(array(networkx.adj_matrix(graph)))
         ds_plot = plots.NetworkPlot(ds)