New visualization 2

app.py

@@ -52,34 +52,43 @@ Future Improvements:
 
 # Visualization 2: Relationship Between Year Constructed and Square Footage
 # This scatter plot explores the relationship between the year a building was constructed and its square footage.
+# Remove rows where 'Square Footage' is missing or invalid
+data['Square Footage'] = pd.to_numeric(data['Square Footage'], errors='coerce')
+filtered_data = data.dropna(subset=['Square Footage'])
+
+# Visualization 2: Relationship Between Square Footage and Total Floors
+# This scatter plot explores the relationship between the square footage of a building and its total floors.
 scatter_plot = (
-    alt.Chart(data)
+    alt.Chart(filtered_data)
     .mark_circle(size=60)
     .encode(
         x=alt.X(
-            "Year Constructed:Q",
-            title="Year Constructed",
-            scale=alt.Scale(domain=[1700, data['Year Constructed'].max()], nice = False)),
-        y=alt.Y("Square Footage:Q", title="Square Footage"),
+            "Square Footage:Q",
+            title="Square Footage",
+            scale=alt.Scale(domain=[filtered_data['Square Footage'].min(), filtered_data['Square Footage'].max()])
+        ),
+        y=alt.Y("Total Floors:Q", title="Total Floors"),
         color=alt.Color("Bldg Status:N", title="Building Status"),
-        tooltip=["Agency Name", "Location Name", "Year Constructed", "Square Footage", "Bldg Status"]
+        tooltip=["Agency Name", "Location Name", "Square Footage", "Total Floors", "Bldg Status"]
     )
     .properties(
-        title="Relationship Between Year Constructed and Square Footage",
+        title="Relationship Between Square Footage and Total Floors",
         width=550,
         height=300
     )
 )
 
 # Explanation for Visualization 2
-st.subheader("Visualization 2: Year Constructed vs. Square Footage")
+st.subheader("Visualization 2: Square Footage vs. Total Floors")
 st.altair_chart(scatter_plot, use_container_width=True)
 st.text("""
-This scatter plot highlights the relationship between the year a building was constructed and its square footage. 
+This scatter plot highlights the relationship between the square footage of a building and its total floors. 
 Design choices include:
-- The x-axis starts at 1700 to focus on relevant construction years.
-- Points are color-coded by building status to differentiate operational buildings from others.
-- Tooltips provide additional information about each building for interactive exploration.
+- Square Footage is represented on the x-axis, as it provides a numeric measure of building size.
+- Total Floors is represented on the y-axis to show the height distribution of buildings.
+- Points are color-coded by building status to differentiate operational buildings.
+- Tooltips provide additional information for exploration.
 Future Improvements:
-- Adding filtering options by county or usage type could make the analysis more granular.
+- Adding filters for building usage or region could enhance the analysis.
 """)
+