tbrm {dplR} | R Documentation |
This calculates a robust average that is unaffected by outliers.
tbrm(x, C = 9)
x |
a numeric vector |
C |
a constant. C is preassigned a value of 9 according to the
Cook reference below. |
This is a one step computation that follows the Affy whitepaper below see
page 22. This function is called by chron
to calculate a
robust mean. Cook and Kairiukstis (1990) have further details.
A numeric mean.
Andy Bunn
Statistical Algorithms Description Document, 2002, Affymetrix. p22. Cook, E. R. and Kairiukstis, L.A. (1990) Methods of Dendrochronology: Applications in the Environmental Sciences. Springer. ISBN-13: 978-0792305866.
tbrm(rnorm(100)) # Compare data(co021) co021.rwi <- detrend(co021,method = "Spline") crn1 <- apply(co021.rwi,1,tbrm) crn2 <- chron(co021.rwi) cor(crn1,crn2[,1])