ir_average: Averages infrared spectra within groups

In henningte/ir: Functions to Handle and Preprocess Infrared Spectra

Averages infrared spectra within groups

Description

ir_average averages infrared spectra within a user-defined group. NA values are omitted by default.

Usage

ir_average(x, ..., na.rm = TRUE, .groups = "drop")

Arguments

x	An object of class ir.
...	Variables in x to use as groups.
na.rm	A logical value indicating if NA values should be dropped (TRUE) or not (FALSE).
.groups	Grouping structure of the result. "drop_last": dropping the last level of grouping. This was the only supported option before version 1.0.0. "drop": All levels of grouping are dropped. "keep": Same grouping structure as .data. "rowwise": Each row is its own group. When .groups is not specified, it is chosen based on the number of rows of the results: If all the results have 1 row, you get "drop_last". If the number of rows varies, you get "keep" (note that returning a variable number of rows was deprecated in favor of reframe(), which also unconditionally drops all levels of grouping). In addition, a message informs you of that choice, unless the result is ungrouped, the option "dplyr.summarise.inform" is set to FALSE, or when summarise() is called from a function in a package.

Value

An object of class ir where spectra have been averaged within groups defined by ....

Examples

# average the sample data spectra across sample types
x <-
  ir_sample_data |>
  ir_average(sample_type)

henningte/ir documentation built on July 4, 2025, 5:12 p.m.