diff --git a/dask_test.py b/dask_test.py
index b92c8f0..2e2d938 100644
--- a/dask_test.py
+++ b/dask_test.py
@@ -49,13 +49,13 @@ try:
     IPython.embed()
 
     with Timing("count()"):
-        print(dp.count().compute())
+        print(dp.count().visualize(filename='count.svg'))
 
     with Timing("mean latitude"):
-        print(dp.groupby(dp.index).latitude.mean().compute())
+        print(dp.groupby(dp.index).latitude.mean().visualize(filename='latitude.svg'))
 
     with Timing("mean longitude"):
-        print(dp.groupby(dp.index).longitude.mean().compute())
+        print(dp.groupby(dp.index).longitude.mean().visualize(filename='longitude.svg'))
 
 finally:
     ########## FIN #######################
diff --git a/run_cluster.py b/run_cluster.py
index 815cf1f..164848f 100644
--- a/run_cluster.py
+++ b/run_cluster.py
@@ -33,7 +33,7 @@ pier    = m.pier(subnet_id = "subnet-05eb26d8649a093e1", # project-subnet-public
                  key_pair  = ("Ari-Brown-HAY", "~/.ssh/Ari-Brown-HAY.pem"),
                  iam       = "Minerva")
 
-cluster = pier.cluster(scheduler, worker, num_workers=sys.argv[1])
+cluster = pier.cluster(scheduler, worker, num_workers=int(sys.argv[1]))
 cluster.start()
 print(cluster.public_location)