Update app.py

app.py

@@ -71,7 +71,7 @@ if uploaded_file is not None:
 
         # Add a slider to change the scale
         with col1:
-            max_scale = int(data // 128)
+            max_scale = int(data.shape[0] // 128)
             scale = st.slider("Scale", 1, max_scale, 1, 1)
 
             plot_image(np.log10(data+1), scale)