Data Flow

NEST CoreDev

Source: vignettes/blueprint/dataflow.Rmd

dataflow.Rmd

The sequence diagram above illustrates the different stages that data goes through within the teal framework, supported by the teal.slice package:

1. Data is created and loaded into teal app;
   • Data sets are wrapped in a teal_data before being passed to the app;
   • The teal_data class facilitates reproducibility;
2. Data is passed to the filter panel;
   • Users (or app developers) can specify filters to apply;
   • Filters can be specified globally, for the whole app, or for specific modules;
   • Filtering code is appended to the data;
   • See the Filter panel vignette for details;
3. Filtered data is sent to teal modules for analysis;
   • Each module receives a teal_data object so analysis code applied to the data is tracked (and can be used to reproduce the whole analysis);

Whenever filters are added or removed, the data coming into modules is re-computed, providing the teal module with new filtered data to conduct the required analysis.