ChemoSpec (version 5.3.21)

sgfSpectra: Apply Savitzky-Golay filters to a Spectra object

Description

This function is a simple wrapper around the function sgolayfilt. It allows one to apply Savitzky-Golay filters to a Spectra object in a convenient way.

Usage

sgfSpectra(spectra, m = 0, ...)

Arguments

spectra

An object of S3 class Spectra to be checked.

m

The desired m-th derivative. m = 0 smooths the data (i.ei a rolling average), m = 1 gives the first derivative etc.

…

Other parameters to be passed to sgolayfilt.

Value

A object of class Spectra.

See Also

Additional documentation at https://bryanhanson.github.io/ChemoSpec/

Examples

# NOT RUN {
data(SrE.IR)
myt1 <- expression(bolditalic(Serenoa) ~ bolditalic(repens) ~ bold(IR ~ Spectra))
myt2 <- expression(bolditalic(Serenoa) ~ bolditalic(repens) ~ bold(IR ~ Spectra ~ (Smoothed)))

par(mfrow = c(2, 1))
plotSpectra(SrE.IR, xlim = c(1900, 2100), yrange = c(0, 0.05), main = myt1)
temp <- sgfSpectra(SrE.IR)
plotSpectra(temp, xlim = c(1900, 2100), yrange = c(0, 0.05), main = myt2)
par(mfrow = c(1, 1))
# }