snapshot...

modules/util/plot.py

@@ -292,11 +292,12 @@ def make_time_domain_hist(values, edges):
     plt.show()
 
 
-def scatter_density(x, y, color, fname=None, fig=None):
+def scatter_density(x, y, color=None, fname=None, fig=None):
     if fig is None:
         fig = plt.figure()
     ax = fig.add_subplot(1, 1, 1, projection='scatter_density')
-    ax.scatter_density(x, y, color=color)
+    if color is not None:
+        ax.scatter_density(x, y, color=color)
 
     if fname is not None:
         fig.savefig(fname)