diff --git a/Flow_class.py b/Flow_class.py
index 584edc21500b2a71f8efe9896c66eefb604f5ef0..b6fdf6eec0c6ed919598b169eb1e00f490b5eca1 100644
--- a/Flow_class.py
+++ b/Flow_class.py
@@ -453,7 +453,7 @@ class Elbow_profile():
     def make_kfac_fully(self,flowmeter = None,ret = False):
         rfine = np.linspace(0,1,int(1e6))
         ufine = self.fully_class.get_u_u_vol(rfine)
-        self.up_fully = np.trapz(rfine,ufine)
+        self.up_fully = np.trapz(ufine,rfine)
         self.k_fully  = 1/self.up_fully
         if ret:
             return self.up_fully,self.k_fully
diff --git a/GUI_Elbow.py b/GUI_Elbow.py
index fa8f11ca87e3c383153627bfc83d7840fdad1120..cc5644bfd4bd838e5b5e2e42b081397418a76486 100644
--- a/GUI_Elbow.py
+++ b/GUI_Elbow.py
@@ -332,7 +332,7 @@ class mainPanel(wx.Panel):
         self.xax_dropdown.SetSelection(0)
         self.xax_dropdown.Bind(wx.EVT_CHOICE, self.Onxax_dropdown)
         # y-axis choices
-        self.yax_dropdown = wx.Choice(self,choices=["error in %","k","k_dis","k_st"])
+        self.yax_dropdown = wx.Choice(self,choices=["error in %","k","k_d"])
         self.yax_dropdown.SetSelection(0)
         self.yax_dropdown.Bind(wx.EVT_CHOICE, self.Onyax_dropdown)
         # add the axes choices and labels to a hbox
@@ -710,25 +710,59 @@ class mainPanel(wx.Panel):
             x = 0
             y = 0 
             xlabel = ""
-        y   *= 100
-        y_u *= 100
+        
+        plot_what = self.yax_dropdown.GetSelection()
+        spreadfac   = 1
+        ylimiter    = 0.02
+        if plot_what == 0:
+            y   *= flow.k_fully*100
+            y_u *= 100
+            spreadfac = 100
+            ylabel = "Error in %"
+        elif plot_what == 1: # this is k-factor
+            y = 1/(y + flow.up_fully)
+            ylabel = "Callibration factor k_p"
+        elif plot_what == 2: # this is k_st-factor
+            y =  flow.up_fully / (y + flow.up_fully) 
+            ylabel = "Correction factor k_d"
+        else: 
+            print("no axes selected")
+            x = 0
+            y = 0 
+            ylabel = ""
+        ylimiter *= spreadfac
         self.ax_meter.cla()
         #
         self.ax_meter.set_xlabel(xlabel)
-        self.ax_meter.set_ylabel("Error in %")
+        self.ax_meter.set_ylabel(ylabel)
         self.ax_meter.plot(x,y,'-')
         
+        
+        
+        ymin = self.ax_meter.get_ylim()[0]
+        ymax = self.ax_meter.get_ylim()[1]
+        ydiff = ymax-ymin
+        print(ydiff)
+        if ydiff < ylimiter:
+            ymin = self.ax_meter.get_ylim()[0]-(ylimiter-ydiff)/2
+            ymax = self.ax_meter.get_ylim()[1]+(ylimiter-ydiff)/2
+            # print("min")
+            # print(ymin)
+            # print("max")
+            # print(ymax)
+            self.ax_meter.set_ylim(ymin,ymax)
+        #
+        # the line-plot of the selected parameter within the x axes 
+        self.ax_meter.plot([x_selected,x_selected],[ymin,ymax],'r-',linewidth=1)
         if y_u.any():
             self.ax_meter.fill_between(x, y - y_u, y + y_u,
                  facecolor='green', 
                  alpha = 0.3,
                  interpolate=True, label="std")
-            self.ax_meter.text(x_selected, self.ax_meter.get_ylim()[0], " " + str(np.round(np.interp(x_selected,x, y),2)) + " | " + str(np.round(np.interp(x_selected,x, y_u),2)), fontsize=14,color='r')
+            self.ax_meter.text(x_selected, ymin, " " + str(np.round(np.interp(x_selected,x, y),2)) + " | " + str(np.round(np.interp(x_selected,x, y_u),2)), fontsize=14,color='r')
         else:
-            self.ax_meter.text(x_selected, min(y), " " + str(np.round(np.interp(x_selected,x, y),2)), fontsize=14,color='r')
-        #
-        # the line-plot of the selected parameter within the x axes 
-        self.ax_meter.plot([x_selected,x_selected],self.ax_meter.get_ylim(),'r-',linewidth=1)
+            self.ax_meter.text(x_selected, ymin, " " + str(np.round(np.interp(x_selected,x, y),2)), fontsize=14,color='r')
+        
         self.ax_meter.grid("on")
         self.fig_meter.tight_layout()
         self.canvas_meter.draw()