SCA: Calculate the spectral contrast angle (SCA) between two...
In CMET-UGent/MicroRaman: Phenotyping of microbial Raman spectroscopy data

Description Usage Arguments References Examples

The SCA measures the angle between two vectors corresponding to closely related spectra to measure whether they are the same or not (Wan *et al.* 2002).

SCA(a, b)

`a`	vector 1
`b`	vector 2

Wan, K. X., Vidavsky, I., & Gross, M. L. (2002). Comparing similar spectra: from similarity index to spectral contrast angle. Journal of the American Society for Mass Spectrometry, 13(1), 85-88.

# Load hyperSpec object
data("hs_example")

# Convert to MassSpectrum object
hs.x.proc <- hs_preprocess(hs_example)

# Calc SCA
disst <- SCA(hs.x.proc@data$spc[1,], hs.x.proc@data$spc[2,])