Update app.py

app.py

@@ -101,7 +101,7 @@ st.plotly_chart(fig)
 
 # Create the contour plot
 fig, ax = plt.subplots()
-contours = ax.contour(Y1, Y2, pdf_values, levels=20)
+contours = ax.contour(y1, y2, pdf_values, levels=20)
 ax.clabel(contours, inline=True, fontsize=8, fmt='%.3f')  # Add labels to the contours
 
 ax.set_xlabel('y1')