Create a LIBS Spectrum Object — ls

Constructs a libs_spectrum S3 object from a wavelength axis and one or more intensity vectors (shots).

Usage

ls_spectrum(wavelength, intensity, metadata = list(), baseline = NULL)

Arguments

wavelength: Numeric vector of wavelengths in nanometers. Must be sortable and contain no NA.
intensity: Numeric vector (single shot) or matrix (multiple shots) of emission intensities. If matrix: rows = shots, columns = wavelength channels, ncol(intensity) must equal length(wavelength).
metadata: Named list of metadata (e.g. sample_id, material, gate_delay_us, integration_time_us, laser_energy_mj, atmosphere, date). Default list().
baseline: Optional numeric vector of baseline values corresponding to each wavelength channel (populated by ls_baseline()). Default NULL.

Value

An object of class libs_spectrum: a named list with elements wavelength, intensity (matrix: shots x channels), metadata, baseline, n_shots, n_channels, and range_nm.

Examples

wl <- seq(200, 900, length.out = 512)
int <- exp(-((wl - 393)^2) / 2) + stats::rnorm(512, 0, 0.05)
spec <- ls_spectrum(wl, int, metadata = list(sample_id = "demo"))
print(spec)
#> <libs_spectrum>
#> • Range: 200-900 nm (512 channels)
#> • Shots: 1
#> • Sample: "demo"
#> • Baseline corrected: FALSE