ir_import_csv {ir}

Imports infrared spectra from various files

Description

ir_import_csv imports raw infrared spectra from one or more .csv file that contains at least one spectrum, with x axis values (e.g. wavenumbers) in the first column and intensity values of spectra in remaining columns. Note that the function does not perform any checks for the validity of the content read from the .csv file.

Usage

ir_import_csv(filenames, sample_id = "from_filenames", ...)

Arguments

filenames

A character vector representing the complete paths to the .csv files to import.

sample_id

Either:

• NULL: Nothing additional happens.

• A character vector with the same length as filenames: This vector will be added as column sample_id to the ir object.

• "from_filenames": The file name(s) will be used as values for a new column sample_id to add (the default).

• "from_colnames": The header in the csv file will be used as values for a new column sample_id to add.

...

Further arguments passed to read.csv().

Value

An object of class ir containing the infrared spectra extracted from the .csv file(s).

Examples

# import data from csv files
d <- ir::ir_import_csv(
  system.file(package = "ir", "extdata/klh_hodgkins_mir.csv"),
  sample_id = "from_colnames")