Update app.py

app.py

@@ -71,25 +71,29 @@ if st.sidebar.button("載入資料"):
         x_column = st.selectbox("選擇 X 軸欄位", options=df.columns)
         y_column = st.selectbox("選擇 Y 軸欄位", options=numeric_columns)
         
-        # Visualization
-        st.subheader("資料視覺化")
+        # Chart type selection
         chart_type = st.radio("選擇圖表類型", ("圓餅圖", "柱狀圖"))
         
-        if chart_type == "圓餅圖":
-            fig = px.pie(df, names=x_column, values=y_column, title=f"{selected_option} 分佈")
-        else:  # 柱狀圖
-            fig = px.bar(df, x=x_column, y=y_column, title=f"{selected_option} 比較")
-        
-        # Apply custom font and styling to the plot
-        fig.update_layout(
-            font_family="Taipei Sans TC Beta",
-            title_font_size=24,
-            legend_title_font_size=14,
-            legend_font_size=12
-        )
-        
-        # Display the chart
-        st.plotly_chart(fig, use_container_width=True)
+        # Button to trigger analysis
+        if st.button("分析數據"):
+            # Visualization
+            st.subheader("資料視覺化")
+            
+            if chart_type == "圓餅圖":
+                fig = px.pie(df, names=x_column, values=y_column, title=f"{selected_option} 分佈")
+            else:  # 柱狀圖
+                fig = px.bar(df, x=x_column, y=y_column, title=f"{selected_option} 比較")
+            
+            # Apply custom font and styling to the plot
+            fig.update_layout(
+                font_family="Taipei Sans TC Beta",
+                title_font_size=24,
+                legend_title_font_size=14,
+                legend_font_size=12
+            )
+            
+            # Display the chart
+            st.plotly_chart(fig, use_container_width=True)
     else:
         st.warning("沒有足夠的數值型欄位來創建圖表。請選擇另一個數據集。")