Data Cleaning

  1. Advanced Data Cleaning Topics
    1. Text Data Cleaning and NLP
      1. Text Preprocessing
        1. Tokenization
          1. Word Tokenization
            1. Sentence Tokenization
              1. Subword Tokenization
                1. Custom Tokenizers
                2. Normalization
                  1. Lowercasing
                    1. Unicode Normalization
                      1. Accent Removal
                        1. Character Standardization
                        2. Noise Removal
                          1. HTML Tag Removal
                            1. URL Removal
                              1. Email Removal
                                1. Special Character Handling
                              2. Advanced Text Processing
                                1. Stop Word Removal
                                  1. Standard Stop Words
                                    1. Custom Stop Words
                                      1. Context-Specific Stop Words
                                      2. Stemming and Lemmatization
                                        1. Porter Stemmer
                                          1. Snowball Stemmer
                                            1. WordNet Lemmatizer
                                              1. Language-Specific Tools
                                              2. Spell Checking and Correction
                                                1. Dictionary-Based Correction
                                                  1. Statistical Correction
                                                    1. Context-Aware Correction
                                                      1. Custom Dictionaries
                                                    2. Language-Specific Challenges
                                                      1. Multilingual Text
                                                        1. Character Encoding Issues
                                                          1. Right-to-Left Languages
                                                            1. Ideographic Languages
                                                            2. Domain-Specific Text Cleaning
                                                              1. Social Media Text
                                                                1. Scientific Literature
                                                                  1. Medical Records
                                                                2. Time Series Data Cleaning
                                                                  1. Temporal Data Issues
                                                                    1. Irregular Time Intervals
                                                                      1. Missing Time Points
                                                                        1. Duplicate Timestamps
                                                                          1. Time Zone Inconsistencies
                                                                          2. Time Series Preprocessing
                                                                            1. Resampling Techniques
                                                                              1. Upsampling
                                                                                1. Downsampling
                                                                                  1. Frequency Conversion
                                                                                  2. Interpolation Methods
                                                                                    1. Linear Interpolation
                                                                                      1. Polynomial Interpolation
                                                                                        1. Spline Interpolation
                                                                                          1. Seasonal Interpolation
                                                                                        2. Temporal Pattern Analysis
                                                                                          1. Trend Detection
                                                                                            1. Seasonality Identification
                                                                                              1. Cyclical Patterns
                                                                                                1. Structural Breaks
                                                                                                2. Time Series Specific Cleaning
                                                                                                  1. Outlier Detection in Time Series
                                                                                                    1. Change Point Detection
                                                                                                      1. Anomaly Detection
                                                                                                        1. Gap Filling Strategies
                                                                                                        2. Multi-Variate Time Series
                                                                                                          1. Cross-Series Validation
                                                                                                            1. Synchronized Cleaning
                                                                                                              1. Relationship Preservation
                                                                                                            2. Geospatial Data Cleaning
                                                                                                              1. Coordinate System Issues
                                                                                                                1. Projection Systems
                                                                                                                  1. Datum Conversion
                                                                                                                    1. Coordinate Transformation
                                                                                                                      1. Precision Handling
                                                                                                                      2. Geographic Data Validation
                                                                                                                        1. Coordinate Range Validation
                                                                                                                          1. Geographic Boundary Checking
                                                                                                                            1. Elevation Validation
                                                                                                                              1. Address Validation
                                                                                                                              2. Spatial Data Processing
                                                                                                                                1. Geocoding and Reverse Geocoding
                                                                                                                                  1. Address Standardization
                                                                                                                                    1. Spatial Interpolation
                                                                                                                                      1. Coordinate Precision
                                                                                                                                      2. Geographic Reference Data
                                                                                                                                        1. Gazetteer Matching
                                                                                                                                          1. Administrative Boundaries
                                                                                                                                            1. Postal Code Validation
                                                                                                                                              1. Place Name Standardization
                                                                                                                                            2. Big Data Cleaning Challenges
                                                                                                                                              1. Scalability Issues
                                                                                                                                                1. Memory Limitations
                                                                                                                                                  1. Processing Time Constraints
                                                                                                                                                    1. Distributed Computing
                                                                                                                                                      1. Parallel Processing
                                                                                                                                                      2. Streaming Data Cleaning
                                                                                                                                                        1. Real-Time Processing
                                                                                                                                                          1. Window-Based Operations
                                                                                                                                                            1. Incremental Updates
                                                                                                                                                              1. Late-Arriving Data
                                                                                                                                                              2. Distributed Cleaning Strategies
                                                                                                                                                                1. Map-Reduce Paradigms
                                                                                                                                                                  1. Spark-Based Cleaning
                                                                                                                                                                    1. Cluster Computing
                                                                                                                                                                      1. Load Balancing
                                                                                                                                                                    2. Automation and Pipeline Development
                                                                                                                                                                      1. Automated Quality Assessment
                                                                                                                                                                        1. Rule-Based Validation
                                                                                                                                                                          1. Statistical Monitoring
                                                                                                                                                                            1. Machine Learning Detection
                                                                                                                                                                              1. Anomaly Alerting
                                                                                                                                                                              2. Self-Healing Data Pipelines
                                                                                                                                                                                1. Automatic Error Recovery
                                                                                                                                                                                  1. Adaptive Cleaning Rules
                                                                                                                                                                                    1. Learning from Corrections
                                                                                                                                                                                      1. Feedback Loops
                                                                                                                                                                                      2. Continuous Data Quality
                                                                                                                                                                                        1. Real-Time Monitoring
                                                                                                                                                                                          1. Quality Dashboards
                                                                                                                                                                                            1. Alerting Systems
                                                                                                                                                                                              1. Performance Metrics
                                                                                                                                                                                              2. Pipeline Orchestration
                                                                                                                                                                                                1. Workflow Management
                                                                                                                                                                                                  1. Dependency Handling
                                                                                                                                                                                                    1. Error Propagation
                                                                                                                                                                                                      1. Rollback Mechanisms

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                                                                                                                                                                                                  9. Tools and Technologies for Data Cleaning

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                                                                                                                                                                                                  11. Best Practices and Documentation