The Essential Steps in Data Preprocessing for Different Data Formats
Blog post from Hex
Data preprocessing is a crucial step in ensuring the accuracy and reliability of data analysis. It involves various techniques such as handling missing values, normalization, encoding categorical variables, dimensionality reduction, tokenization, stop word removal, stemming/lemmatization, feature extraction, resampling, creating lag features, image resizing, grayscale conversion, pixel value scaling, and edge detection. These steps are tailored to different types of data including structured, textual, temporal, and image data. Proper preprocessing ensures that the input data is clean, consistent, and ready for analysis or model training, leading to higher quality insights.
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