Unused function parameter

Reports function parameters that are not used in the function body.

Example:

my_fahrenheit_to_celsius  <- function(f_temp) {
  return((temp - 32) * 5 / 9)
}

Revise the highlighted code fragment to ensure the parameter is used or remove it.

Possible solution:

my_fahrenheit_to_celsius  <- function(f_temp) {
  return((f_temp - 32) * 5 / 9)
}

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

RUnusedParameter

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | R

Inspection ID: RUnusedParameter

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection RUnusedParameter

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

DataSpell 2025.2

Inspection Details
By default bundled with:	DataSpell 2025.2,
Can be installed with plugin:	R Language, 252.26661.0

Last modified: 18 September 2025