mavg: Smoothing by moving average

In mlesnoff/rchemo: Dimension reduction, Regression and Discrimination for Chemometrics

Smoothing by moving average

Description

Smoothing, by moving average, of the row observations (e.g. spectra) of a dataset.

Usage

mavg(X, n = 5)

Arguments

X	X-data (n, p).
n	The number of points (i.e. columns of X) defining the window over wich is calculate each average. The smoothing is calculated for the point at the center of the window. Therefore, n must be an odd integer, and be higher or equal to 3.

Value

A matrix of the transformed data.

Examples

data(cassav)

X <- cassav$Xtest
headm(X)

Xp <- mavg(X, n = 11)
headm(Xp)

oldpar <- par(mfrow = c(1, 1))
par(mfrow = c(1, 2))
plotsp(X, main = "Signal")
plotsp(Xp, main = "Corrected signal")
abline(h = 0, lty = 2, col = "grey")
par(oldpar)

mlesnoff/rchemo documentation built on April 15, 2023, 1:25 p.m.