Data Science Educational Resources
StrataScratch is a data science educational platform with over 1,000+ real interview questions from your favorite companies.
Guides
How to Use Python’s Sleep Function
Learning how the Python sleep function works and how to apply it for timing control, automation, and data processing tasks
Nathan Rosidi -
Best Practices for R Continuous Integration
Implementing Continuous Integration in R: Automate Tests, Detect Errors Early, and Keep Your Analysis ConsistentNathan Rosidi -
How to Remove an Element from a List in Python
Different Ways to Remove Items from Python Lists with Practical ExamplesNathan Rosidi -
PCA Analysis in Python for Beginners
A Practical Walkthrough of Principal Component Analysis with Real-World Examples in PythonNathan Rosidi -
Exploring NumPy where() in Python for Conditional Operations
Master NumPy where() for smarter data filtering, conditional replacements, and interview-ready logic with clean, efficient Python code.Nathan Rosidi -
How to Implement Delays Using Python WAIT Function
A Complete Guide to Implementing Waits in Python Using Sleep, Asyncio, Threading, and SubprocessesNathan Rosidi -
Implementing a Logit Model in R Effectively
How to build and interpret a logit model in R to predict customer churn: data preparation, modeling, and evaluationNathan Rosidi -
Case Statement in Python: Best Practices and Alternatives
Mastering case statement in Python with best practices, alternatives, and real-life applicationsNathan Rosidi -
How to Effectively Use the PySpark 'isin' Function
PySpark isin explained with filtering examples using lists, variables, combined columns, and a real interview-style case studyNathan Rosidi -
Creating R Programming Histogram for Data Visualization
Step-by-step guide to creating, customizing, and interpreting R programming histograms using real student performance dataNathan Rosidi -
How to Perform Exploratory Data Analysis in Python (With Example)
Step-by-step Exploratory Data Analysis in Python: From summarizing and visualizing to cleaning and preparing data for modeling.Nathan Rosidi -
How to Define and Use Static Methods in Python
A practical guide to defining and applying static methods in Python using Walmart’s Black Friday dataset to segment customer spending.Nathan Rosidi -