In-App Data

In teal: Exploratory Web Apps for Analyzing Clinical Trials Data

Building data in the App

Typically the data that is passed into a teal application is available before the app is run. However, this is not always true and in some cases the data will be built only after the app has started. A good example is pulling the data from an external repository, like a database, or uploading a file. Additional authentication may be required.

teal_data_module

Preprocessing actions can be performed in-app using the teal_data_module. Rather than passing a teal_data object to the app, one may pass a shiny module that returns a teal_data object (wrapped in a reactive expression). This allows the app developer to include user actions data creation, fetching, and even pre-filtering modification.

Further reading

A complete explanation of using the teal_data_module can be found in this teal vignette

teal documentation built on Aug. 21, 2025, 5:58 p.m.