crr: Cosmic ray removal

In konradmayer/hyperSpec.utils: Utility functions to work with objects of the hyperSpec class

Description

Cosmic spikes are often appearing in Raman spectra which were aquired using CCD detectors and need to be removed before further analysis. This function is implemented using the R code provided with Whitaker and Hayes 2018.

Usage

crr(x, threshold = 30)

Arguments

x	an object of class hyperSpec.
threshold	numeric.

Value

an object of class hyperSpec with cosmic rays removed.

References

Whitaker, Darren A., Hayes Kevin, A simple algorithm for despiking Raman spectra, Chemometrics and Intelligent Laboratory Systems, Volume 179, 2018, Pages 82-84, https://doi.org/10.1016/j.chemolab.2018.06.009.

Examples

## Not run: 
chondro_spike <- chondro
# add spikes
chondro_spike[[20, , 800]] <- 5000
chondro_spike[[50, , 1400]] <- 4000
chondro_spike[[50, , 1200]] <- 5000
plot(chondro_spike)
# despike
despiked <- crr(chondro_spike)
plot(despiked)

## End(Not run)

konradmayer/hyperSpec.utils documentation built on May 2, 2021, 4:17 a.m.