Weight based knife-edge selectivity function

A knife-edge selectivity function where weights greater or equal to knife_edge_size are fully selected and no fish smaller than this size are selected.

Usage

knife_edge(w, knife_edge_size, ...)

Arguments

w

Vector of sizes.

knife_edge_size

The weight at which the knife-edge operates.

...

Unused

Value

Vector of selectivities at the given sizes.

Details

You would not usually call this function directly. Instead, set the sel_func column in gear_params() to "knife_edge" and provide knife_edge_size as an additional column. setFishing() will then call this function automatically when calculating the selectivity array.

See also

gear_params() for setting the knife_edge_size parameter.

Other selectivity functions: double_sigmoid_length(), sigmoid_length(), sigmoid_weight()

Examples

knife_edge(w = c(1, 10, 100, 1000), knife_edge_size = 100)
#> [1] 0 0 1 1