Lanzante {rshift}

Lanzante L-test

Description

performs the L-method for detection of regime shifts (Lanzante, 1996)

Usage

Lanzante(data, col, time, p = 0.05, merge = FALSE)

Arguments

data

The dataframe to be used.

col

The column we are measuring change on.

time

The column containing time units (e.g. age of a subsample)

p

The largest p-value you want to check regime shifts for. Defaults to p = 0.05.

merge

Sets the result to be either a regime-shift only table (if FALSE), or an addition to the original table (if TRUE)

Value

If merge = FALSE (default), produces a 2-column table of time (the time value for each regime shift) and p (the p-value for each regime shift). If merge = TRUE, returns the original dataset with an extra p-value column, giving the p-value for each time unit - 0 for non-shift years.

Examples

Lanzante(lake_data, "DCA1", "Age")
Lanzante(lake_data, "DCA1", "Age", p=0.10, merge=TRUE)