ir_add: Add infrared spectra

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

Add infrared spectra

Description

ir_add takes two objects of class ir, x and y, and adds the intensity values of spectra in matching rows from y to that of x.

Usage

ir_add(x, y)

Arguments

x	An object of class ir.
y	An object of class ir or a numeic value. If y is an object of class ir, it must have the same number of rows as x and the same x axis values (e.g. wavenumber values) in each matching spectrum as in x.

Value

x where for each spectrum the respective intensity values in y are added.

Examples

x1 <-
  ir::ir_add(ir::ir_sample_data, ir::ir_sample_data)
x2 <-
  ir::ir_add(ir::ir_sample_data, ir::ir_sample_data[1, ])

# adding a numeric value to an object of class `ir`.
x3 <-
  ir::ir_add(ir::ir_sample_data, 1)

# adding a numeric vector from an object of class `ir`.
x4 <-
  ir::ir_add(
     ir::ir_sample_data,
     seq(from = 0, to = 2, length.out = nrow(ir::ir_sample_data))
  )

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