xcor2: Cross Correlation

In RSEIS: Seismic Time Series Analysis Tools

Cross Correlation

Description

Cross correlation of two signals

Usage

xcor2(a1, a2, DT, PLOT = FALSE, LAG = 100)

Arguments

a1	input signal 1
a2	input signal 1
DT	deltaT in seconds
PLOT	logical TRUE=plot
LAG	time lag for correlation function

Details

Illustrates the cross correlation of two time series.

Value

ccf	Return list from function ccf
mlag	maximum lag in time
mccx	value of ccf at max lag mlag
mlag2	maximum absolute value lag
mccx2	value of ccf at mlag2

Author(s)

Jonathan M. Lees<jonathan.lees.edu>

See Also

ccf

Examples

data(CE1)

ts1 <- CE1$y[CE1$x>5.443754 & CE1$x<5.615951]

ts2 <- CE1$y[CE1$x>5.760959]
ts2 <- ts2[1:length(ts1)]

ts1 <- ts1-mean(ts1)
ts2 <- ts2-mean(ts2)

xc <- xcor2(ts1, ts2, CE1$dt , PLOT = TRUE)

RSEIS documentation built on Aug. 19, 2023, 5:07 p.m.