added method to fit data in DataSet1D formar

src/easyreflectometry/fitting.py

@@ -4,7 +4,9 @@
 import scipp as sc
 from easyscience.fitting import AvailableMinimizers
 from easyscience.fitting.multi_fitter import MultiFitter as EasyScienceMultiFitter
+from easyscience.fitting import FitResults
 
+from easyreflectometry.data import DataSet1D
 from easyreflectometry.model import Model
 
 
@@ -54,6 +56,15 @@ def fit(self, data: sc.DataGroup, id: int = 0) -> sc.DataGroup:
             )
         return new_data
 
+    def fit_data_set_1d(self, data: DataSet1D) -> FitResults:
+        """
+        Perform the fitting and populate the DataGroups with the result.
+
+        :param data: DataGroup to be fitted to and populated
+        :param method: Optimisation method
+        """
+        return self.easy_science_multi_fitter.fit(data.x, data.y, weights=data.ye)
+
     def switch_minimizer(self, minimizer: AvailableMinimizers) -> None:
         """
         Switch the minimizer for the fitting.