accumulate {mefa} | R Documentation |
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).
accumulate(x)
x |
an object of class 'sscount'. |
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. |
Peter Solymos, Solymos.Peter@aotk.szie.hu, http://www.univet.hu/users/psolymos/personal/
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)