ir_subtract: Subtract infrared spectra

In ir: Functions to Handle and Preprocess Infrared Spectra

Subtract infrared spectra

Description

ir_subtract takes two objects of class ir, x and y, and subtracts the intensity values of spectra in matching rows from y from that of x. Alternatively, takes an object of class ir, x, and a numeric value, y, and subtracts y from all intensity values in x.

Usage

ir_subtract(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 subtracted (if y is an object of class ir), or where for each spectrum y has been subtracted from the intensity values.

Examples

# subtracting two objects of class ir
x1 <-
  ir::ir_subtract(ir::ir_sample_data, ir::ir_sample_data)
x1 <-
  ir::ir_subtract(ir::ir_sample_data, ir::ir_sample_data[1, ])

# subtracting a numeric value from an object of class `ir`.
x2 <-
  ir::ir_subtract(ir::ir_sample_data, 20)

ir documentation built on May 2, 2022, 5:06 p.m.