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Connect to Quandl Data in RapidMiner

Integrate Quandl data with standard components and data source configuration wizards in RapidMiner Studio.

This article shows how you can easily integrate the CData JDBC driver for Quandl into your processes in RapidMiner. This article uses the CData JDBC Driver for Quandl to transfer Quandl data to a process in RapidMiner.

Connect to Quandl in RapidMiner as a JDBC Data Source

You can follow the procedure below to establish a JDBC connection to Quandl:

  1. Add a new database driver for Quandl: Click Connections -> Manage Database Drivers.
  2. In the resulting wizard, click the Add button and enter a name for the connection.
  3. Enter the prefix for the JDBC URL: jdbc:quandl:
  4. Enter the path to the cdata.jdbc.quandl.jar file, located in the lib subfolder of the installation directory.
  5. Enter the driver class: cdata.jdbc.quandl.QuandlDriver
  6. Create a new Quandl connection: Click Connections -> Manage Database Connections.
  7. Enter a name for your connection.
  8. For Database System, select the Quandl driver you configured previously.
  9. Enter your connection string in the Host box.

    Quandl uses an API key for authentication. See the help documentation for a guide to obtaining the APIKey property.

    Additionally, set the DatabaseCode connection property to the code identifying the Database whose Datasets you want to query with SQL. You can search the available Databases by querying the Databases view.

    Built-in Connection String Designer

    For assistance in constructing the JDBC URL, use the connection string designer built into the Quandl JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.

    java -jar cdata.jdbc.quandl.jar

    Fill in the connection properties and copy the connection string to the clipboard.

    A typical connection string is below:

    APIKey=abc123;DatabaseCode=WIKI;
  10. Enter your username and password if necessary.

You can now use your Quandl connection with the various RapidMiner operators in your process. To retrieve Quandl data, drag the Retrieve operator from the Operators view. With the Retrieve operator selected, you can then define which table to retrieve in the Parameters view by clicking the folder icon next to the "repository entry." In the resulting Repository Browser, you can expand your connection node to select the desired example set.

Finally, wire the output to the Retrieve process to a result, and run the process to see the Quandl data.