From d7592f3c1288abd8d54d547b2983c843cbb6fc0d Mon Sep 17 00:00:00 2001
From: Sander Roosendaal <roosendaalsander@gmail.com>
Date: Sun, 22 Oct 2017 11:55:20 +0200
Subject: [PATCH] bug fix

---
 rowers/dataprep.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 92c5c37b..d24c549c 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -182,7 +182,11 @@ def clean_df_stats(datadf,workstrokesonly=True,ignorehr=True,
     except KeyError:
         pass
 
-    datadf=datadf.clip(lower=0)
+    try:
+        datadf=datadf.clip(lower=0)
+    except TypeError:
+        pass
+
     datadf.replace(to_replace=0,value=np.nan,inplace=True)