The Comprehensive R Archive Network (CRAN)
The official repository for R, offering not only the R software itself but also extensive documentation, manuals, FAQs, and a vast collection of packages contributed by the R community. It's the authoritative source for R-related information.
More resources on Statistical Software (R, Python)
Scikit-learn Official Documentation
Scikit-learn is a widely used open-source machine learning library for Python. Its documentation provides extensive user guides, tutorials, and examples for various classification, regression, clustering, and dimensionality reduction algorithms.
NumPy Official Documentation
NumPy is the fundamental package for scientific computing with Python, providing support for large, multi-dimensional arrays and matrices, along with a collection of high-level mathematical functions. Its official documentation is crucial for understanding array operations and numerical computing in Python.
Pandas Official Documentation
The definitive and comprehensive documentation for the Pandas library, an indispensable tool for data manipulation and analysis in Python. It includes user guides, API references, and tutorials for working with DataFrames and Series.
RStudio Cheat Sheets
RStudio (now Posit) provides a collection of incredibly useful, visually appealing cheat sheets for various R packages and tasks, including `ggplot2`, `dplyr`, data import, R Markdown, and more. These are excellent quick-reference guides for R users.
MarinStatsLectures
A YouTube channel offering a vast library of video lectures on statistics and R programming. It covers a wide range of statistical topics from basic descriptive statistics to advanced inferential methods, often demonstrating their application in R.
freeCodeCamp.org
This non-profit organization provides numerous free coding tutorials and full courses, including extensive content on Python for data science, machine learning, and deep learning. Their YouTube channel features long, comprehensive videos that are well-structured and beginner-friendly.