For each species, convert between length and weight using the relationship
$$w_i = a_i l_i^{b_i}$$ or
$$l_i = (w_i / a_i)^{1/b_i}$$
where a and b are taken from the species parameter data frame and
\(i\) is the species index.
Usage
l2w(l, species_params)
w2l(w, species_params)
Arguments
- l
Lengths in cm. Either a single number used for all species or a
vector with one number for each species.
- species_params
A species parameter data frame or a MizerParams object.
- w
Weights in grams. Either a single number used for all species or a
vector with one number for each species.
Value
A vector with one entry for each species. l2w() returns a vector
of weights in grams and w2l() returns a vector of lengths in cm.
Details
This is useful for converting a length-based species parameter to a
weight-based species parameter.
If any a or b parameters are missing the default values a = 0.01 and
b = 3 are used for the missing values.
