dev (#297)

this time it will not break!

Co-authored-by: Dominik Demuth <dominik.demuth@physik.tu-darmstadt.de>
Reviewed-on: #297

src/gui_qt/main/management.py

@@ -791,16 +791,27 @@ class UpperManagement(QtCore.QObject):
         _active = self.graphs[self.current_graph].active
 
         new_datasets = {}
+        groupby = params.pop('groupby')
+
         for sid in _active:
             data_i = self.data[sid]
-            if data_i.group not in new_datasets:
-                new_datasets[data_i.group] = [], []
-            new_x_axis, _temp = new_datasets[data_i.group]
-
             pts = data_i.points(params)
-            if pts:
-                new_x_axis.append(data_i.value)
-                _temp.append(pts)
+
+            if groupby == 'group':
+                if data_i.group not in new_datasets:
+                    new_datasets[data_i.group] = [], []
+                new_x_axis, _temp = new_datasets[data_i.group]
+                if pts:
+                    new_x_axis.append(data_i.value)
+                    _temp.append(pts)
+
+            else:
+                for (_x, _y, _yerr) in pts:
+                    if _x not in new_datasets:
+                        new_datasets[_x] = [], []
+                    new_x_axis, _temp = new_datasets[_x]
+                    new_x_axis.append(data_i.value)
+                    _temp.append([[_x, _y, _yerr]])
 
         key_list = []
         for label, (new_x_axis, _temp) in new_datasets.items():