R Programming By Example

The input, output, and rendering functions

Each *Input() function requires several arguments. The first one is a string with the name for the widget, which will only be used by you. The second one is a label which will be shown to the user in your application. The remaining arguments for each *Input() function vary depending on its functionality. They include things like initial values, ranges, and increments. You can find the exact arguments needed by a widget on the widget function's help page, (for example, ? selectInput). The following table shows all available *Input() functions with an indication of what they are used for:

The Input*() function	Use
actionButton()	Action button
checkboxGroupInput()	Group of checkboxes ...