This plots the difference between the spectra relative to their average. So if we denote the number density from the first object as \(N_1(w)\) and that from the second object as \(N_2(w)\), then this plot shows $$2 (N_2(w) - N_1(w)) / (N_2(w) + N_1(w)).$$
Arguments
- object1
An object of class MizerSim or MizerParams
- object2
An object of class MizerSim or MizerParams
- ...
Parameters passed to
plotSpectra()
Details
The individual spectra are calculated by the plotSpectra()
function which
is passed all additional arguments you supply. So you can for example
determine a size range over which to average the simulation results via the
time_range
argument. See plotSpectra()
for more options.
Note that it does not matter whether the relative difference is calculated for the number density or the biomass density or the biomass density in log weight because the factors of \(w\) by which the densities differ cancels out in the relative difference.