accumulate {mefa}R Documentation

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.

Author(s)

Peter Solymos, Solymos.Peter@aotk.szie.hu, http://www.univet.hu/users/psolymos/personal/

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)

[Package mefa version 1.1-2 Index]