plot_phase_2d: Plot 2d phase plot of 'N_t' vs 'N_t-1' or 'Y_t' vs 'Y_t-1'

In luke-a-rogers/pbsedm: An R package to implement some of the methods of empirical dynamic modelling

Plot 2d phase plot of 'N_t' vs 'N_t-1' or 'Y_t' vs 'Y_t-1'

Description

Shows the values in two-dimensional phase space (first differenced or not) with lag of 1. Cobwebbing shows how one point iterates to the next point in the time series.

Usage

plot_phase_2d(
  values,
  X.or.N = "X",
  par.mar.phase = c(3, 0, 1, 0),
  axis.range = NA,
  start = 1,
  last.time.to.plot = NULL,
  pt.type = "p",
  cobwebbing = TRUE,
  late.col = "red",
  early.col = "black",
  early.col.lines = "lightgrey",
  late.num = 3,
  label = NULL,
  label.cex = 0.7
)

Arguments

values	vector of 'N_t' or 'Y_t' values
X.or.N	"N" if raw non-differenced data, "X" for differenced data
par.mar.phase	'par(mar)' values
axis.range	range of axes, if NA then calculated from values
start	first time step to plot (currently must be 1)
last.time.to.plot	last time value of N[t] to use when plotting, so final Y[t] used will be Y[t-1] (since Y[t] uses N[t+1])
pt.type	'type' value for 'points()'
cobwebbing	if TRUE then add cobwebbing lines to phase plot
late.col	colour in which to plot final 'late.num' time steps
early.col	colour in which to plot earlier time step points
early.col.lines	colour in which to plot earlier time step points
late.num	final number of 'N[t]' time steps to plot in a different colour
label	label to annotate plot, such as '(a)' etc. for six-panel figure
label.cex	size of label annotation

Value

Plots figure to current device

Author(s)

Andrew Edwards

Examples

  plot_phase_2d(NY_lags_example$N_t, X.or.N = "N")
  plot_phase_2d(NY_lags_example$Y_t, X.or.N = "X")

luke-a-rogers/pbsedm documentation built on June 3, 2024, 5:20 a.m.