diff --git a/data analysis/analysis/analysis.py b/data analysis/analysis/analysis.py
index ec7d9419..4a915d32 100644
--- a/data analysis/analysis/analysis.py	
+++ b/data analysis/analysis/analysis.py	
@@ -348,8 +348,8 @@ def histo_analysis(hist_data):
 
 def regression(inputs, outputs, args): # inputs, outputs expects N-D array 
 
-    inputs = inputs[~numpy.isnan(x)]
-    outputs = outputs[~numpy.isnan(x)]
+    inputs = inputs[~np.isnan(x)]
+    outputs = outputs[~np.isnan(x)]
     regressions = []
 
     if 'lin' in args: # formula: ax + b