If the species argument contains invalid species, then these are ignored but a warning is issued.
valid_species_arg(object, species = NULL, return.logical = FALSE)
A MizerSim or MizerParams object from which the species should be selected.
The species to be selected. Optional. By default all target species are selected. A vector of species names, or a numeric vector with the species indices, or a logical vector indicating for each species whether it is to be selected (TRUE) or not.
Whether the return value should be a logical vector. Default FALSE.
A vector of species names, in the same order as specified in the 'species' argument. If 'return.logical = TRUE' then a logical vector is returned instead, with length equal to the number of species, with TRUE entry for each selected species.