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    Try R

    R is a tool for statistics and data modeling. The R programming language is elegant, versatile, and has a highly expressive syntax designed around working with data. R is more than that, though — it also includes extremely powerful graphics capabilities. If you want to easily manipulate your data and present it in compelling ways, R is the tool for you.

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    Table of Contents

    1. R Syntax: A gentle introduction to R expressions, variables, and functions
    2. Vectors: Grouping values into vectors, then doing arithmetic and graphs with them
    3. Matrices: Creating and graphing two-dimensional data sets
    4. Summary Statistics: Calculating and plotting some basic statistics: mean, median, and standard deviation
    5. Factors: Creating and plotting categorized data
    6. Data Frames: Organizing values into data frames, loading frames from files and merging them
    7. Working With Real-World Data: Testing for correlation between data sets, linear models and installing additional packages

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    8. Try R Completion Badge