change_pop_bin function

Set up population length bin structure

The population length bins in Stock Synthesis structure size data and empirical weight-at-age data. change_pop_bin changes the data file to contain specifications to create a vector (length-bin method of 2) rather than the actual bins from the length data (length-bin method of 1) or an actual vector (length-bin method of 3).

change_pop_bin(dat_list, binwidth = NULL, minimum_size = NULL,
  maximum_size = NULL, maximum_age = NULL)

Arguments

• dat_list: An SS data list object as read in from SS_readdat in the r4ss package. Make sure you select option section=2.
• binwidth: A numeric value specifying the width of the size bins.
• minimum_size: The smallest size bin.
• maximum_size: The largest size bin.
• maximum_age: The highest age. Used to structure the maximum age of the population and the ageing-error matrix, which will be assumed to have no bias and maximum precision for any added ages.

Returns

A modified Stock Synthesis data file in list form. The list is only returned if it is assigned to an object.

Details

The only required argument is dat_list and the remaining arguments default to a value of NULL, which leads to the data file not being changed.