notch {RTisean}R Documentation

Notch filter

Description

Notch filter in the time domain.

Usage

notch(series, X, f = 1, w, l, x = 0, c = 1)

Arguments

series a matrix or a vector.
X frequency to be cancelled.
f sampling rate of data.
w width of filter.
l number of values to be read.
x number of values to be skipped.
c column to be read.

Value

A vector consisting of the filtered time series.

Examples

## Not run: 

numdata <- 500      
dat <- cos(1:numdata/25)+rnorm(numdata,0,0.1)
plot(dat,xlab="Time",t="l",ylab="Cos Data")
filteredat <- notch(dat,X=100)
points(filteredat,col=2,t="l")

dat <- lynx
plot(log(dat),ylab="Lynx data")
filteredat <- log(notch(dat,X=0.5,w=1))
filteredat <- ts(filteredat, start=1821, end=1934)
points(filteredat ,col=2,t="l")

## End(Not run)

[Package RTisean version 3.0.10 Index]