data-tools

Before using tools for preprocessing task it is important to understand the category of data you're working with.
Data categories: Nominal Data, Ordinal data, Intervel data,Ratio data, Discrete data, Contnuous data, Categorical data, Numerical data, Binary data, Text data, Time series data, Geospatial data, Network data, Image data, and Audio data

Tools for data preprocessing.

Preprocessing challenges
Missing data

• Deletion methods
  • Listwise & Pairwise deletion
• Imputation methods
  • Mean/ Median/ Mode imputation
  • Linear regression imputaiton
  • K-nearest Neighbors imputation
  • Multiple imputation
  • Impute with zero