Normalisation

Standardizing data distributions for consistency.

In ML:

• Z-Normalisation
• Standardisation
• Normalisation vs Standardisation
• Batch Normalisation

In Data Engineering:

• Normalisation of data
• Normalised Schema
• How to normalise a merged table

In NLP:

• Normalisation of Text

# --- 15. GroupBy with Transformation (Using transform to align with original dataframe)
df['Value_transformed'] = df.groupby('Category')['Value'].transform(lambda x: x - x.mean())
# get the mean value for each category
print(df.groupby('Category')['Value'].mean())
print("\nTransformed Values with mean subtracted (transform()):")
print(df.sort_values('Category'))