The function returns a valid gear parameter data frame that can be used
by setFishing() or it gives an error message.
validGearParams(gear_params, species_params)A valid gear parameter data frame
Gear parameter data frame
Species parameter data frame
The gear_params data frame is allowed to have zero rows, but if it has rows, then the following requirements apply:
There must be columns species and gear and any species - gear pair is
allowed to appear at most once. Any species that appears must also appear
in the species_params data frame.
There must be a sel_func column. If a selectivity function is not
supplied, it will be set to "knife_edge".
There must be a catchability column. If a catchability is not supplied,
it will be set to 1.
All the parameters required by the selectivity functions must be provided.
If gear_params is empty, then this function tries to find the necessary information in the species_params data frame. This restricts each species to be fished by only one gear. Defaults are used for information that can not be found in the species_params dataframe, as follows:
If there is no gear column or it is NA then a new gear named after the
species is introduced.
If there is no sel_func column or it is NA then knife_edge is used.
If there is no catchability column or it is NA then this is set to 1.
If the selectivity function is knife_edge and no knife_edge_size is
provided, it is set to w_mat.
The row names of the returned data frame are of the form "species, gear".
When gear_params is NULL and there is no gear information in
species_params, then a gear called knife_edge_gear is set up with a
knife_edge selectivity for each species and a knive_edge_size equal to
w_mat. Catchability is set to 0.3 for all species.
gear_params()