Plot Surprise Map (sf) — plot.bs_surprise

Plots a surprise map using sf's plot method. For ggplot2 integration, see geom_surprise() and scale_fill_surprise().

Usage

# S3 method for class 'bs_surprise_sf'
plot(
  x,
  y = NULL,
  which = c("surprise", "signed_surprise"),
  pal = NULL,
  breaks = NULL,
  nbreaks = 9,
  main = NULL,
  border = "grey50",
  lwd = 0.2,
  key.pos = 4,
  ...
)

Arguments

x: A bs_surprise_sf object
y: Unused (for S3 method compatibility)
which: Which variable to plot: "surprise" or "signed_surprise"
pal: Color palette. If NULL, uses default diverging palette for signed surprise and sequential for unsigned.
breaks: Breaks for color scale. If NULL, uses pretty breaks.
nbreaks: Number of breaks if breaks is NULL
main: Plot title. If NULL, auto-generated.
border: Border color for polygons
lwd: Line width for borders
key.pos: Position of legend (1=below, 2=left, 3=above, 4=right, NULL=none)
...: Additional arguments passed to sf::plot()

Value

Invisibly returns the input object

Examples

library(sf)
nc <- st_read(system.file("shape/nc.shp", package = "sf"), quiet = TRUE)
result <- surprise(nc, observed = SID74, expected = BIR74)

# Default plot
plot(result)


# Plot signed surprise
plot(result, which = "signed_surprise")


# Custom palette
plot(result, pal = heat.colors(9))