spnormw: Normalizes the Absorbance of a Matrix of Mid-infrared Spectra...
In spftir: Pre-Processing and Analysis of Mid-Infrared Spectral Region

Description Usage Arguments Value Author(s) Examples

The absorbance values of the matrix of mid-infrared spectra is normalized by a specific band.

1	spnormw(spectra, wn)

`spectra`	matrix. The matrix of FTIR spectra. The first row corresponds to wavenumber; the remaining rows corresponds to absorbances.
`wn`	numeric. Specific band (wavenumber) used to normalize the spectra.

A matrix spectra normalized by a specific band. The first row corresponds to wavenumber; the remaining rows corresponds to absorbances.

Claudio Pozo Valenzuela [aut, cre] and Saddys Rodriguez-llamazares [aut]

data(spData)
# Convert data frame to matrix
spectra <- as.matrix(t(spData))
# Normalized spectra by a specific band
normw <- spnormw(spectra=spectra, wn=1510)