Update app.py

app.py

@@ -44,8 +44,8 @@ def PDF_Preparation(Your_PDF_Name, Qmin, Qmax, Qdamp, rmax, nyquist):
       Gr = Gr[np.where(r==1)[0][0]:] # Remove Data from 0 to 0.5 AA
       Gr = Gr[::10] # Nyquist sample the rest of the Data
       Gr = np.concatenate(([0,0,0,0,0,0,0,0,0,0], Gr), axis=0) # Concatenate 0 - 0.5 AA on the Gr.
-    if nyquist == "No" or nyquist == "no":
-      Gr = Gr[::10] # Nyquist sample Data
+    if not nyquist:
+      Gr = Gr[::10] # Pseudo Nyquist sample Data
     if len(Gr) >= (rmax*10+1):
       Gr = Gr[:(rmax*10+1)] # In the case Data is up to more than 30 AA, we do not use it.
     else: