The server-side logic for the `csvFileInput` module. It uses
the `DataManager` R6 class to handle all data processing.
Usage
csvFile(input, output, session, nfactor.limit = 20)
Arguments
- input, output, session
Standard Shiny server parameters.
- nfactor.limit
An integer, the threshold for unique values to suggest
a numeric variable as categorical, Default: 20
Value
A reactive expression that returns a list with two elements:
`data` (the processed data.table) and `label` (a data.table with variable
label information).