tablesaw-weka-package

Weka package that takes advantage of the tablesaw Java dataframe and visualization library.

Tablesaw dependencies

Use bootstrapp to download all the dependencies (adjust version of tablesaw if necessary):

java -jar bootstrapp-0.1.5-spring-boot.jar --dependency tech.tablesaw:tablesaw-core:0.38.1 --output_dir ./out

Copy all jars from ./out/target/lib into the projects lib directory.

Plugins

Input/Output

• Loader

  • TableSawCsvLoader - for loading CSV files

• Saver

  • TableSawCsvSaver - for saving CSV files

Filter

The weka.filters.Tablesaw filter allows you to apply the following table operations:

• CountBy - generates a table with two columns, the first with the name of the categorical value and the second with the count for that value.
• First - returns the first X number of rows
• Last - returns the last X number of rows
• MissingValueCounts - counts the missing values (outputs single row)
• MultiTableOperation - applies all specified table operations sequentially
• PassThrough - dummy, just passes through the data
• RemoveColumns - removes specified columns
• RetainColumns - keeps specified columns
• RemoveColumnsWithMissingValues - drops columns with missing values
• RemoveRowsWithMissingValues - drops rows with missing values
• SampleN - generates a sub-sample of size N
• SampleSplit - splits data into two and returns either first or second part
• SampleX - generates a sub-sample of proportion X (0.0-1.0)
• Sort - sorts the data using specified columns (ascending or descending)
• Summary - generates a summary for the specified column

Note: Since the data needs to be converted into Tablesaw's dataframe format, the data may still get modified (e.g., change in attribute types), despite the PassThrough operation being selected.

Releases

• 2021.3.3

Maven

Use the following dependency in your pom.xml:

    <dependency>
      <groupId>com.github.fracpete</groupId>
      <artifactId>tablesaw-weka-package</artifactId>
      <version>2021.3.3</version>
      <type>jar</type>
      <exclusions>
        <exclusion>
          <groupId>nz.ac.waikato.cms.weka</groupId>
          <artifactId>weka-dev</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

How to use packages

For more information on how to install the package, see:

https://waikato.github.io/weka-wiki/packages/manager/