add Vs to dataframe (again)

app.py

@@ -70,7 +70,7 @@ def wb_ava_fig(vwater=1520., rwater = 1025., poissons=0.49):
     r = loop_zrpp(**params)
     
     # Put the results into a DataFrame
-    df = pd.DataFrame({"Vp sub-WB": VP1, "Poisson_s ratio": POI,
+    df = pd.DataFrame({"Vp sub-WB": VP1, "Poisson_s ratio": POI, "Vs sub-WB": VS1,
                    "Angle": THE, "Amplitude": np.real(r)})
     
     # Select only points pre-critical angle