FEAT: added units to export_to_csv method (#4691)

Co-authored-by: maxcapodi78 <Shark78>

pyaedt/modules/solutions.py

@@ -725,13 +725,30 @@ def export_data_to_csv(self, output, delimiter=";"):
         -------
         bool
         """
-        header = [el for el in self._sweeps_names]
+        header = []
+        des_var = self._original_data[0].GetDesignVariableNames()
+        sweep_var = self._original_data[0].GetSweepNames()
+        for el in self._sweeps_names:
+            unit = ""
+            if el in des_var:
+                unit = self._original_data[0].GetDesignVariableUnits(el)
+            elif el in sweep_var:
+                unit = self._original_data[0].GetSweepUnits(el)
+            if unit == "":
+                header.append("{}".format(el))
+            else:
+                header.append("{} [{}]".format(el, unit))
+        # header = [el for el in self._sweeps_names]
         for el in self.expressions:
+            data_unit = self._original_data[0].GetDataUnits(el)
+            if data_unit:
+                data_unit = " [{}]".format(data_unit)
             if not self.is_real_only(el):
-                header.append(el + " (Real)")
-                header.append(el + " (Imag)")
+
+                header.append(el + " (Real){}".format(data_unit))
+                header.append(el + " (Imag){}".format(data_unit))
             else:
-                header.append(el)
+                header.append(el + "{}".format(data_unit))
 
         list_full = [header]
         for e, v in self._solutions_real[self.active_expression].items():