check trendline_equation

1 files changed, 3 insertions, 0 deletions

diff --git a/api.py b/api.py
index 60144fd..c9b8c5d 100644
--- a/api.py
+++ b/api.py
@@ -64,6 +64,9 @@ def plot_data(x_data, y_data, std_dev_data, color_picker, labels, df,
 
     handles = plots
 
+    if trendline_equation == "":
+        trendline_equation = None
+
     if enable_trendline:
         if trendline_equation != None:
             try: