bin_changes: Counts the changes in a series of time bins

In graemetlloyd/Claddis: Measuring Morphological Diversity and Evolutionary Tempo

Counts the changes in a series of time bins

Description

Given a vector of dates for a series of time bins and another for the times when a character change occurred will return the total number of changes in each bin.

Usage

bin_changes(change_times, time_bins)

Arguments

change_times	A vector of ages in millions of years at which character changes are hypothesised to have occurred.
time_bins	An object of class timeBins.

Details

Calculates the total number of evolutionary changes in a series of time bins. This is intended as an internal function for rate calculations, but could be used for other purposes (e.g., counting any point events in a series of time bins).

Value

A vector giving the number of changes for each time bin. Names indicate the maximum and minimum (bottom and top) values for each time bin.

Author(s)

Graeme T. Lloyd [e-mail]

Examples

# Create a random dataset of 100 changes (between 100 and 0 Ma):
change_times <- stats::runif(n = 100, min = 0, max = 100)

# Create 10 equal-length time bins:
time_bins <- matrix(data = c(seq(from = 100, to = 10, length.out = 10),
  seq(from = 90, to = 0, length.out = 10)), ncol = 2,
  dimnames = list(LETTERS[1:10], c("fad", "lad")))

# Set class as timeBins:
class(time_bins) <- "timeBins"

# Get N changes for each bin:
bin_changes(change_times = change_times, time_bins = time_bins)

graemetlloyd/Claddis documentation built on May 9, 2024, 8:07 a.m.