MeanDensity: Mean density

In StoXProject/RstoxTempDoc: Temporary package for documenting the RstoxFramework package

Description

The Mean Density function aggregates densities horizontally to a courser density resolution by layer

Usage

MeanDensity()

Arguments

parameterName

Parameter descrption.

Details

The Mean Density function aggregates input densities (no. fish per square nautical mile) horizontally, to a courser density resolution by layer. Density data can have the horizontal resolutions EDSU (elementary distance sampling unit, (Simmonds and MacLennan, 2005)), PSU (primary sampling unit), stratum or survey (all strata of the survey).

The parameter SampleUnitType is used to set the horizontal resolution of the output data from the process. This output cannot have a finer resolution than the input. A weighted mean density is calculated from the input data. The distance (nautical miles) which each of the input records represent, is used as the weighting variable for the calculation of the mean density values.

Reference:

Simmonds, J., and MacLennan, D. 2005. Fisheries Acoustics. Theory and Practice, Blackwell Science, Oxford. 437 pp.

Value

A data.table is returned with awesome stuff.

See Also

roxygenize is used to generate the documentation.

Examples

x <- 1

StoXProject/RstoxTempDoc documentation built on Dec. 31, 2019, 1:50 p.m.