teradata-silhouette-analysis

name	Teradata Silhouette Analysis
description	Silhouette coefficient for clustering quality evaluation

Teradata Silhouette Analysis

Property	Value
Skill Name	Teradata Silhouette Analysis
Description	Silhouette coefficient for clustering quality evaluation
Category	Model Evaluation
Primary Function	TD_Silhouette
Framework	SQLE

Core Capabilities

• Automated table structure analysis via DBC.ColumnsV
• Dynamic SQL generation for TD_Silhouette
• Complete workflow from data preparation to results interpretation
• Data quality validation and preprocessing guidance
• Parameter optimization and tuning

Key Parameters

• TargetColumns: Feature columns used for clustering
• ClusterIDColumn: Column containing cluster assignments
• IDColumn: Unique row identifier

Use Cases

1. Clustering quality assessment
2. Optimal K selection for K-Means
3. Cluster separation measurement
4. Comparing clustering algorithms

Example Usage

-- TD_Silhouette execution
SELECT * FROM TD_Silhouette (
    ON {USER_DATABASE}.{CLUSTERED_TABLE} AS InputTable
    USING
    TargetColumns ('{FEATURE_COLUMNS}')
    ClusterIDColumn ('{CLUSTER_ID_COLUMN}')
    IDColumn ('{ID_COLUMN}')
) AS dt;

Scripts Included

Core Analytics Scripts

• table_analysis.sql: Automatic table structure discovery
• preprocessing.sql: Data preparation and feature engineering
• model_training.sql: TD_Silhouette execution
• evaluation.sql: Results analysis and metrics
• complete_workflow_template.sql: End-to-end workflow

Utility Scripts

• data_quality_checks.sql: Comprehensive data validation
• parameter_tuning.sql: Parameter optimization
• diagnostic_queries.sql: Results diagnostics and interpretation

Best Practices

• Always run table_analysis.sql first to understand your data structure
• Validate data quality before executing the analytical function
• Use parameter_tuning.sql to find optimal configuration
• Review diagnostic_queries.sql output for model/results validation

Limitations

• Requires Teradata Vantage 17.20+ with ClearScape Analytics
• Input data must meet function-specific requirements
• Results depend on data quality and parameter configuration

Teradata Silhouette Analysis - ClearScape Analytics skill for Teradata Vantage