Tablesaw

Overview

Tablesaw is Java for data science. It includes a dataframe and a visualization library, as well as utilities for loading, transforming, filtering, and summarizing data. It's fast and careful with memory. If you work with data in Java, it may save you time and effort. Tablesaw also supports descriptive statistics and integrates well with the Smile machine learning library.

Tablesaw features

Data processing & transformation

Import data from RDBMS, Excel, CSV, JSON, HTML, or Fixed Width text files, whether they are local or remote (http, S3, etc.)
Export data to CSV, JSON, HTML or Fixed Width files.
Combine tables by appending or joining
Add and remove columns or rows
Sort, Group, Query
Map/Reduce operations
Handle missing values

Visualization

Tablesaw supports data visualization by providing a wrapper for the Plot.ly JavaScript plotting library. Here are a few examples of the new library in action.

Statistics

Descriptive stats: mean, min, max, median, sum, product, standard deviation, variance, percentiles, geometric mean, skewness, kurtosis, etc.

Getting started

Add tablesaw-core to your project. You can find the version number for the latest release in the release notes:

<dependency>
    <groupId>tech.tablesaw</groupId>
    <artifactId>tablesaw-core</artifactId>
    <version>VERSION_NUMBER_GOES_HERE</version>
</dependency>

You may also add supporting projects:

tablesaw-beakerx - for using Tablesaw inside BeakerX
tablesaw-excel - for using Excel workbooks
tablesaw-html - for using HTML
tablesaw-json - for using JSON
tablesaw-jsplot - for creating charts

Documentation and support

Start here: https://jtablesaw.github.io/tablesaw/gettingstarted
Then see our documentation page: https://jtablesaw.github.io/tablesaw/ and the Tablesaw User Guide.

And always feel free to ask questions or make suggestions here on the issues tab.

Integrations

We recommend trying Tablesaw inside Jupyter notebooks, which lets you experiment with Tablesaw in a more interactive manner. Get started by installing BeakerX and trying the sample Tablesaw notebook
You may utilize Tablesaw with many machine learning libraries. To see an example of using Tablesaw with Smile check out the sample Tablesaw Jupyter notebook
You may use quandl4j-tablesaw if you'd like to load financial and economic data from Quandl into Tablesaw. This is demonstrated in the sample Tablesaw notebook as well

hallvard/tablesaw