Add scaling strategies

frontend/pages/normalization.py

@@ -1,14 +1,15 @@
 import streamlit as st
-from mvstrategy import MVStrategy
+from normstrategy import MVStrategy, ScalingStrategy
 
 if "data" in st.session_state:
     data = st.session_state.data
     st.session_state.data = data.copy()
 
     for column, series in data.items():
+        col1, col2 = st.columns(2)
         missing_count = series.isna().sum()
         choices = MVStrategy.list_available(data, series)
-        option = st.selectbox(
+        option = col1.selectbox(
             f"Missing values of {column} ({missing_count})",
             choices,
             index=1,
@@ -17,6 +18,14 @@ if "data" in st.session_state:
         # Always re-get the series to avoid reusing an invalidated series pointer
         data = option.apply(data, column, data[column])
 
+        choices = ScalingStrategy.list_available(data, series)
+        option = col2.selectbox(
+            "Scaling",
+            choices,
+            key=f"scaling-{column}",
+        )
+        data = option.apply(data, column, data[column])
+
     st.write(data)
     st.session_state.working_data = data
 else: