DataManager: DataManager R6 Class for Shiny Modules

In jsmodule: 'RStudio' Addins and 'Shiny' Modules for Medical Research

DataManager R6 Class for Shiny Modules

Description

An R6 class to manage data loading, preprocessing, and common UI elements for various Shiny modules in the package. It handles file reading (csv, xlsx, sav, sas7bdat, dta), initial variable analysis, and the rendering and logic for common data manipulations like creating binary variables, changing factor references, and subsetting data. This class is designed to be used internally by other Shiny server modules to reduce code duplication.

Public fields

input

Shiny module's input object.

output

Shiny module's output object.

session

Shiny module's session object.

ns

Shiny module's namespace function.

nfactor.limit

The threshold for unique values to suggest a numeric variable as a factor.

initial_data_info

A reactive value holding the initially loaded data and its metadata.

processed_data

A reactive value holding the data after all transformations have been applied.

Methods

Public methods

• DataManager$new()

• DataManager$get_reactive_data()

• DataManager$clone()

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Method new()

Create a new DataManager object.

Usage

DataManager$new(input, output, session, nfactor.limit = 20)

Arguments

input

Shiny module's input object.

output

Shiny module's output object.

session

Shiny module's session object.

nfactor.limit

The maximum number of unique values for a continuous variable to be suggested as a factor.

Returns

A new 'DataManager' object.

---

Method get_reactive_data()

Returns the final processed data as a reactive expression. This is the main output to be used by the calling module.

Usage

DataManager$get_reactive_data()

Returns

A reactive expression that returns a list containing the processed 'data', 'label' information, and 'naomit' message.

---

Method clone()

The objects of this class are cloneable with this method.

Usage

DataManager$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

jsmodule documentation built on Nov. 5, 2025, 6:07 p.m.