bugs: fit display did not work when not all functions are checked; FC calc_relax changed x axis

nmreval/distributions/loggaussian.py

@@ -23,8 +23,7 @@ class LogGaussian(Distribution):
     bounds = [(0, 10)]
 
     @staticmethod
-    def distribution(tau, tau0, *args):
-        sigma = args[0]
+    def distribution(tau, tau0, sigma: float):
         return np.exp(-0.5*(np.log(tau/tau0)/sigma)**2)/np.sqrt(2*np.pi)/sigma
 
     @staticmethod

nmreval/gui_qt/fit/fitwindow.py

@@ -82,7 +82,9 @@ class QFitDialog(QtWidgets.QWidget, Ui_FitDialog):
             self._current_function = None
 
         else:
-            self._current_function = self.functionwidget.use_combobox.currentData()
+            f_tree = self.functionwidget.functree
+            func_idx = f_tree.currentItem().data(0, f_tree.counterRole)
+            self._current_function = self.functionwidget.functions[func_idx]
 
     @QtCore.pyqtSlot(int)
     def show_function_parameter(self, function_id: int, function_idx: int = None):
@@ -457,6 +459,7 @@ class QFitDialog(QtWidgets.QWidget, Ui_FitDialog):
 
     def set_parameter_iter(self, fit_id: str | None, param: List[float], functions: List, cnt: int = 0):
         for model_p in functions:
+            if model_p['active']:
                 cnt += self.param_widgets[model_p['cnt']].set_parameter(fit_id, param[cnt:])
                 if model_p['children']:
                     cnt += self.set_parameter_iter(fit_id, param, model_p['children'], cnt=cnt)

nmreval/models/fieldcycling.py

@@ -25,7 +25,7 @@ class _AbstractFC:
     def _calc_relax(cls, x, c, *args, xaxis='freq', yaxis='chi', is_bpp=True, **kwargs):
         _x = x
         if xaxis == 'freq':
-            _x *= 2*np.pi
+            _x = 2*np.pi * x
 
         if is_bpp:
             r1 = cls.relax.t1(_x, *args, prefactor=c, inverse=False)