Read a LIBS Spectrum from File — ls_read

Reads a single spectrum file. Supports CSV, TSV, and TXT formats where columns represent wavelength and intensity.

Usage

ls_read_spectrum(
  path,
  format = "auto",
  wavelength_col = 1,
  intensity_col = 2,
  skip = 0,
  metadata = list(),
  verbose = TRUE
)

Arguments

path: Character. Path to spectrum file.
format: Character. One of "auto" (detect from extension), "csv", "tsv", "txt". Default "auto".
wavelength_col: Column index or name for wavelength values. Default 1.
intensity_col: Column index/indices or name(s) for intensity values. Multiple columns are interpreted as multiple shots. Default 2.
skip: Integer. Header lines to skip before the data table. Default 0.
metadata: Named list of additional metadata. Default list().
verbose: Logical. Emit import messages. Default TRUE.

Value

A libs_spectrum object.

Examples

tmp <- tempfile(fileext = ".csv")
wl <- seq(200, 900, length.out = 100)
int <- exp(-((wl - 393)^2) / 2)
utils::write.csv(data.frame(wavelength = wl, intensity = int),
                 tmp, row.names = FALSE)
spec <- ls_read_spectrum(tmp, verbose = FALSE)
unlink(tmp)