paleoTS (version 0.4-4)

ln.paleoTS: Log transform paleontological time series data

Description

This function performs an approximate log-transformation (base e) of a paleoTS object.

Usage

ln.paleoTS(y)

Arguments

y

a paleontological time series

Value

• the converted paleoTS object.

Details

For a random variable x, its approximate mean on a log scale is the log of its untransformed mean. The approximate variance on a log scale is equal to the squared coefficient of variation.

References

Hunt, G. 2006. Fitting and comparing models of phyletic evolution: random walks and beyond. Paleobiology 32:578--601. Lewontin, R. 1966. On the measurement of relative variability. Systematic Zoology 15:141--142.

See Also

std.paleoTS

Examples

y <- sim.GRW(20, 20, 1)
 yl <- ln.paleoTS(y)
 print (yl)