Update app.py

app.py

@@ -21,7 +21,7 @@ sidebar_option = st.sidebar.radio("Select an option",
                                   "Drawing: Rainbow Coloring", "Drawing: Random Geometric Graph","Drawing: Self-loops",
                                   "Drawing: Simple Path", "Drawing: Spectral Embedding", "Drawing: Traveling Salesman Problem",
                                   "Drawing: Weighted Graph", "3D Drawing: Animations of 3D Rotation", "3D Drawing: Basic Matplotlib",
-                                  "Graph: DAG - Topological Layout", "Graph: Erdos Renyi"])
+                                  "Graph: DAG - Topological Layout", "Graph: Erdos Renyi", "Graph: Karate Club"])
 
 # Helper function to draw and display graph
 def draw_graph(G, pos=None, title="Graph Visualization"):
@@ -29,6 +29,58 @@ def draw_graph(G, pos=None, title="Graph Visualization"):
     nx.draw(G, pos=pos, with_labels=True, node_color='lightblue', node_size=500, font_size=10, font_weight='bold')
     st.pyplot(plt)
 
+def karate_club_graph():
+    st.title("Graph: Karate Club")
+
+    # Sidebar selection for Default Example or Custom Graph
+    graph_mode = st.radio(
+        "Choose a Mode:",
+        ("Default Example", "Create Your Own"),
+        help="Default example shows the Karate Club graph, or you can create your own graph."
+    )
+
+    if graph_mode == "Default Example":
+        # Load the Karate Club graph
+        G = nx.karate_club_graph()
+
+        # Display node degree
+        st.write("### Node Degree")
+        for v in G:
+            st.write(f"Node {v:4}: Degree = {G.degree(v)}")
+
+        # Visualize the graph using circular layout
+        st.write("### Graph Visualization")
+        fig, ax = plt.subplots()
+        nx.draw_circular(G, with_labels=True, ax=ax, node_color="skyblue", edge_color="gray")
+        ax.set_title("Karate Club Graph")
+        st.pyplot(fig)
+
+    elif graph_mode == "Create Your Own":
+        st.write("### Create Your Own Graph")
+
+        # Allow user to input the number of nodes and edges for custom graph
+        num_nodes = st.number_input("Number of nodes", min_value=2, value=10)
+        num_edges = st.number_input("Number of edges", min_value=1, value=15)
+
+        # Create random graph with user input
+        G = nx.gnm_random_graph(num_nodes, num_edges)
+
+        # Display node degree
+        st.write("### Node Degree")
+        for v in G:
+            st.write(f"Node {v:4}: Degree = {G.degree(v)}")
+
+        # Visualize the graph using circular layout
+        st.write("### Graph Visualization")
+        fig, ax = plt.subplots()
+        nx.draw_circular(G, with_labels=True, ax=ax, node_color="lightgreen", edge_color="gray")
+        ax.set_title("Custom Graph")
+        st.pyplot(fig)
+
+# Display the corresponding page based on sidebar option
+if sidebar_option == "Graph: Karate Club":
+    karate_club_graph()
+
 def erdos_renyi_graph():
     st.title("Graph: Erdos Renyi")