Comprehensive Data Cleaning and Preprocessing

Starting at

$

10

/hr

About this service

Summary

I specialize in data cleaning and preprocessing, ensuring raw data is transformed into a structured, high-quality format for accurate analysis. From handling missing values and outliers to encoding categorical data and feature engineering, I prepare datasets that are ready for modeling and insights. My approach ensures clean, reliable, and well-structured data, optimizing performance for analytics and machine learning.

What's included

  • Data Cleaning and Preprocessing

    1️⃣ Data Quality Assessment Identifying missing values, duplicates, inconsistencies, and outliers. 2️⃣ Handling Missing Data Imputation using mean, median, mode, forward/backward fill, or advanced ML techniques. 3️⃣ Duplicate & Outlier Removal Detecting and removing redundant data entries and extreme values affecting analysis. 4️⃣ Data Standardization & Normalization Scaling numerical data using MinMaxScaler, StandardScaler, or log transformation for consistency. 5️⃣ Categorical Data Encoding Converting categorical variables into numeric format using One-Hot Encoding, Label Encoding, or Target Encoding. 6️⃣ Feature Engineering & Selection Creating new features, transforming existing ones, and selecting the most relevant attributes for analysis. 7️⃣ Data Formatting & Structuring Converting data into a structured format (CSV, Excel, SQL, JSON) for further analysis or modeling. 8️⃣ Final Cleaned Dataset & Report Providing the processed dataset along with a summary report detailing all transformations and justifications.


Skills and tools

Data Modelling Analyst

Data Scientist

Data Analyst

Data Analysis

MATLAB

MATLAB

Microsoft Excel

Microsoft Excel

pandas

pandas

Tableau

Tableau