17 - Using a parameter to filter object sets

📖 Task Introduction

You can use your parameter value to filter object sets. In this task, you’ll use your parameter output to enable users to filter your flights to just those that have the selected carrier. This (optionally) filtered object set will eventually form the basis of your line chart.

🔨 Task Instructions

1. Click the Objects category button in the bottom right corner of your Route Flights card.

2. Choose Filter object set.

3. Change the name of the new card to Filtered Route Flights.

4. Your new Filtered Route Flights card is now asking you to define your filter terms. On your canvas, click the ➕ And pill near the top of your Filtered Route Flights card.

5. You’ll now define the property to filter your Route Flights. On the right side of the pop-up window, choose . . . where carrier name is . . .. A textual representation of your filter logic appears in your card with an empty Search . . . field.

6. Click the dropdown arrow to the right of that Search . . . field and choose Carrier Name Select Parameter.

   • There is currently no value in your parameter, so the number of flights in this object set hasn’t changed yet (which you can see on the left side of your card). See the image below to compare your progress.

   

7. Save your analysis.

📚 Recommended Reading (~3 min read)

Filtering object sets is a common workflow in Foundry’s Ontology-aware applications. Read this documentation page to better understand the available filtering behavior in Quiver.