plotFeedingLevel: Plot the feeding level of species by size

Description

After running a projection, plot the feeding level of each species by size. The feeding level is averaged over the specified time range (a single value for the time range can be used).

Usage

plotFeedingLevel(
  object,
  species = NULL,
  time_range,
  highlight = NULL,
  all.sizes = FALSE,
  include_critical = FALSE,
  return_data = FALSE,
  ...
)
plotlyFeedingLevel(
  object,
  species = NULL,
  time_range,
  highlight = NULL,
  include_critical,
  ...
)

Value

A ggplot2 object, unless return_data = TRUE, in which case a data frame with the variables 'w', 'value' and 'Species' is returned. If also include_critical = TRUE then the data frame contains a fourth variable 'Type' that distinguishes between 'actual' and 'critical' feeding level.

Arguments

object: An object of class MizerSim or MizerParams.
species: 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.
time_range: The time range (either a vector of values, a vector of min and max time, or a single value) to average the abundances over. Default is the final time step. Ignored when called with a MizerParams object.
highlight: Name or vector of names of the species to be highlighted.
all.sizes: If TRUE, then feeding level is plotted also for sizes outside a species' size range. Default FALSE.
include_critical: If TRUE, then the critical feeding level is also plotted. Default FALSE.
return_data: A boolean value that determines whether the formatted data used for the plot is returned instead of the plot itself. Default value is FALSE
...: Other arguments (currently unused)

Details

When called with a MizerSim object, the feeding level is averaged over the specified time range (a single value for the time range can be used to plot a single time step). When called with a MizerParams object the initial feeding level is plotted.

If include_critical = TRUE then the critical feeding level (the feeding level at which the intake just covers the metabolic cost) is also plotted, with a thinner line. This line should always stay below the line of the actual feeding level, because the species would stop growing at any point where the feeding level drops to the critical feeding level.

Examples

Run this code

# \donttest{
params <-  NS_params
sim <- project(params, effort=1, t_max=20, t_save = 2, progress_bar = FALSE)
plotFeedingLevel(sim)
plotFeedingLevel(sim, time_range = 10:20, species = c("Cod", "Herring"),
                 include_critical = TRUE)

# Returning the data frame
fr <- plotFeedingLevel(sim, return_data = TRUE)
str(fr)
# }