diff --git a/sourcetracker/_sourcetracker.py b/sourcetracker/_sourcetracker.py
index 038cac4..b7e608a 100644
--- a/sourcetracker/_sourcetracker.py
+++ b/sourcetracker/_sourcetracker.py
@@ -833,6 +833,11 @@ def cumulative_proportions(all_envcounts, sink_ids, source_ids):
     are met. It is the user's responsibility to check these if using this
     function independently.
     '''
+
+    np.save('envcounts',all_envcounts)
+    np.save('sink_ids',sink_ids)
+    np.save('source_ids',source_ids)
+    
     num_sinks = len(sink_ids)
     num_sources = len(source_ids) + 1