tapsum: tapsum simplifies the use of tapply for summarizing variables

In haddonm/rforcpue: Functions to Assist With The Analysis of CPUE Data

tapsum simplifies the use of tapply for summarizing variables

Description

data exploration commonly uses the tapply function and tapsum simplifies its use when obtaining the sum of any variable relative to other variables. For example it is common to want the total catch by year and, for example, Month, DepCat, Zone, etc.

Usage

tapsum(indat, first, second, third = NA, div = 1000)

Arguments

indat	the data.frame containing the raw fishery data
first	the variable name (in quotes) being summed
second	the first grouping variable
third	the second grouping variable, defaults to NA
div	defaults to 1000 to change Kg to tonnes. set to 1.0 or NA to avoid its influence

Value

a vector or matrix of sums of the pickvar by the first and optionally the second grouping variable

Examples

## Not run: 
  data(sps)
  tapsum(sps,"catch_kg","Year","Month")

## End(Not run)

haddonm/rforcpue documentation built on Oct. 12, 2024, 11:55 p.m.