allArrangements: GammaModel::allArrangements

In UCL/GammaModel: Modelling age-at-death profiles using the Gamma distribution

Description

Generates a data frame of all possible arrangements of the counts in rows. Age classes that always share counts remain as multi-classes.

Usage

allArrangements(counts)

Arguments

counts

A one-row data frame comprising integer counts, with column names in capital letters. Formatting requirements detailed in checkCountsFormat.

Details

Calculating the probability of the observed counts under some model probabilities requires calculating the sum of the probabilities across all possible arrangements (each row).

Memory demands from the total number of arrangements rapidly becomes huge if there are many counts across many multi-classes, rendering the calculation of exact probabilities inpractical.

Value

Data frame of all possible arrangements of the counts in rows, and age classes in columns.

Examples

    # All 30 possible arrangements for site 'PPI'
    # Notice classes E & F (also H & I) always share counts 
    data(Neolithic)
    counts <- Neolithic['PPI',]
    allArrangements(counts)

    # Number of possible arrangements can be very large
    counts <- Neolithic['TRA2',]
    x <- allArrangements(counts)
    nrow(x)
	

UCL/GammaModel documentation built on June 25, 2020, 5:38 a.m.