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

Description Usage Arguments Value 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). This function returns a dist object based on the SCA for downstream processing.

1	hs_SCAdiss(x)

`x`	a hyperSpec object containing the cells in the rows, and wavenumbers (features) in columns

a distance object containing the SCA between each cell

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)

# cluster cells
disst <- hs_SCAdiss(hs.x.proc)