Calculate weight-length relationship parameters
estimate_weight_length.RdCalculate weight-length relationship parameters
Usage
estimate_weight_length(
data,
col_length = "length_cm",
col_weight = "weight_kg",
verbose = FALSE
)Arguments
- data
A data frame containing empirical weights and lengths from sampled fish. Sexes should be available in the column
sexorSEX.- col_length
A numeric or character value specifying the column to use in
datafor length information. These lengths are assumed to be in centimeters. The default value islength_cm.- col_weight
A numeric or character value specifying the column to use in
datafor weight information. These weights are assumed to be in kilograms The default value isweight_kg.- verbose
A logical that specifies if you want to print messages and warnings to the console. The default is
TRUE.
Value
A data frame of weight-length parameters by sex.
Parameters A and B are in the appropriate units to input
into Stock Synthesis Wtlen_1_Fem and Wtlen_2_Fem, or
Wtlen_1_Mal and Wtlen_1_Mal, parameters in the
control file. Values of NA are returned for models that
did not have enough data to properly estimate the parameters.
This will happen when there are no females in your data set,
for example.