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Correct Wavelengths with a Wavelength Calibration

Source: R/wavelength_calibration.R
predict.specproc_wavelength_calibration.Rd

Converts measured wavelengths to calibrated ones with the correction fitted by wavelength_calibration().

Usage

# S3 method for class 'specproc_wavelength_calibration'
predict(object, wavelength, ...)

Arguments

object

The result of wavelength_calibration().

wavelength

Measured wavelengths, in nm.

...

Not used.

Value

The corrected wavelengths. Each wavelength gets the correction of the detector segment whose range contains it (the first one where detectors overlap), or of the nearest segment.

See also

wavelength_calibration(), apply_calibration()

Examples

data(forageLIBS)
spectra <- forageLIBS[-(1:14)]
wl <- as.numeric(names(spectra))
first_detector <- spectra[seq_len(which(diff(wl) < 0)[1])]
reference <- c(`Mg I` = 285.213, `Ca II` = 317.933, `Ca II` = 393.366, `K I` = 404.414,
               `Ca I` = 422.673, `Mg I` = 518.360, `Na I` = 588.995, `Ca I` = 643.907)
cal <- wavelength_calibration(first_detector, reference)
# the corrected wavelengths of the Ca II H and K lines
predict(cal, c(393.3, 396.8))
#> [1] 393.3549 396.8556