mefa (version 1.1-4)

accumulate: Data Accumulation Trends from 'sscount' Object

Description

This function can be used to assess accumulation trends based on object of class 'sscount', if segment column of the 'sscount' object can be ordered (e.g. collecting dates).

Usage

accumulate(x)

Arguments

x

an object of class 'sscount'.

Value

• A data frame with nlevels(x$data$segment) number of rows and 7 columns.
• segment
  ordered levels of x$data$segment.
• newrecord
  number of new records (or number of individuals, based on x$data$count).
• newsamp
  number of new samples in subsequent segment levels (records are treated as segments within samples).
• newspec
  number of new species in subsequent segment levels.
• cumrecord
  cumulative number of new records.
• cumsamp
  cumulative number of new samples in subsequent segment levels (records are treated as segments within samples).
• cumspec
  cumulative number of new species in subsequent segment levels.

See Also

sscount

Examples

ssc <- sscount(data.frame(
    LETTERS[rpois(20,1)+1], # samples
    letters[rpois(20,2)+1], # species
    rpois(20,10)+2000,      # years of observetions
    rep(1,20)))             # single counts for each rows

ssc$data

accumulate(ssc)