plot_SR: Plot stock-recruitment function
In tcarruth/MSEtool: Management Strategy Evaluation Toolkit

Plot stock-recruitment (with recruitment deviations if estimated).

plot_SR(
  Spawners,
  expectedR,
  R0 = NULL,
  S0 = NULL,
  rec_dev = NULL,
  trajectory = FALSE,
  y_zoom = NULL,
  ylab = "Recruitment"
)

`Spawners`	A vector of the number of the spawners (x-axis).
`expectedR`	A vector of the expected recruitment (from the stock-recruit function) corresponding to values of `Spawners`.
`R0`	Virgin recruitment.
`S0`	Virgin spawners.
`rec_dev`	If recruitment deviations are estimated, a vector of estimated recruitment (in normal space) corresponding to values of `Spawners`.
`trajectory`	Indicates whether arrows will be drawn showing the trajectory of spawners and recruitment deviations over time.
`y_zoom`	If recruitment deviations are plotted, the y-axis limit relative to maximum expected recruitment `expectedR`. If `NULL`, all recruitments are plotted.
`ylab`	Character string for label on y-axis.