mizer (version 2.3.0)

gear_params: Gear parameters

Description

These functions allow you to get or set the gear parameters stored in a MizerParams object. These are used by setFishing() to set up the selectivity and catchability and thus together with the fishing effort determine the fishing mortality.

Usage

gear_params(params)
gear_params(params) <- value

Arguments

params

A MizerParams object

value

A data frame with the gear parameters.

Details

The gear_params data has one row for each gear-species pair and one column for each parameter that determines how that gear interacts with that species. For the details see setFishing().

If you change a gear parameter, this will be used to recalculate the selectivity and catchability arrays by calling setFishing(), unless you have previously set these by hand.

See Also

validGearParams()

Other functions for setting parameters: resource_params(), setExtMort(), setFishing(), setInitialValues(), setInteraction(), setMaxIntakeRate(), setMetabolicRate(), setParams(), setPredKernel(), setReproduction(), setResource(), setSearchVolume(), species_params()

Examples

# NOT RUN {
params <- NS_params
# gears set up in example
gear_params(params)
# setting totally different gears
gear_params(params) <- data.frame(
    gear = c("gear1", "gear2", "gear1"),
    species = c("Cod", "Cod", "Haddock"),
    catchability = c(0.5, 2, 1),
    sel_fun = c("sigmoid_weight", "knife_edge", "sigmoid_weight"),
    sigmoidal_weight = c(1000, NA, 800),
    sigmoidal_sigma = c(100, NA, 100),
    knife_edge_size = c(NA, 1000, NA)
    )
gear_params(params)
# changing an individual entry
gear_params(params)["Cod, gear1", "catchability"] <- 0.8
# }