3-Minute Analytics – How to manipulate a configuration node in KNIME?
Welcome! One more step to take before becoming a KNIME Expert. In this 3-Minute Analytics course , you will take your analyses further with more complex nodes.
As a reminder, 3-Minute Analytics is a series of articles on the Mydral blog dedicated to the KNIME platform.
Today, we have a comprehensive tutorial on how to use a configuration node. Let's get started!
Mydral also invites you to watch this video tutorial:
This tutorial is therefore intended to help you understand how to manipulate a Configuration node in KNIME.
KNIME offers several configuration nodes.
They are used to configure your workflows and metanodes and allow users to run jobs on the server.
In this example, I will add a component that will allow Sport-up to view its orders by region according to the dates provided.
To do this, I will select the file containing the orders using File Reader, and convert the Order date column from string to Date&Time using the String to Date&Time node.
Now, I install the Date&Time Configuration node, which is connected to the Date&Time-based Row Filter node. The configuration node allows you to enter a date that will then be available in the flow. The next node accesses this new variable and filters the data according to the selected date.
To make the workflow easier to read and insert the information we want to filter, we will create a Component.
- I select the two Date&Time nodes -> right-click -> Create a component.
- Open it, right-click -> Open
Now, we will add a new configuration node so that the user can select one or more regions.
In the Node Repository, select Nominal Row filter Configuration and drag it onto the line behind Component Output. The line should turn red.
Once inserted, we can add a description to inform the user of the filter's role. In order for it to filter only the Region Name column, after selecting it, we lock it with Lock Column. Then we add all the regions to Include so that the user can choose from among them.
Finally, the workflow is ready. The user can now double-click on the component and insert their choice of regions and the date to be included.
Your tutorial ends here. Thank you for following along! Ready for the next one?
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