Update imputation_launcher.py

raiss/imputation_launcher.py

@@ -62,7 +62,7 @@ class ImputationLauncher(object):
         for ld_file in glob.glob(pattern):
             print("processing Region: {0}".format(ld_file))
             ld_batch = imputer(ld_file)
-            zscore_results = pd.concat([zscore_results, ld_batch])
+            zscore_results = pd.concat([zscore_results, ld_batch],sort=False)
 
         zscore_results.sort_values(by="pos", inplace=True)
         zscore_results = realigned_zfiles_on_panel(ref_panel, zscore_results)