phyloregion (version 1.0.6)

plot_swatch: Plot shapefile polygons based on slot values

Description

plot_swatch maps discretized values of a quantity using continuous color gradients.

Usage

plot_swatch(
  x,
  values = NULL,
  col = hcl.colors(n = 10, palette = "Blue-Red 3", rev = FALSE),
  key_label = "",
  leg = 10,
  lwd = 15,
  pos = "bottomleft",
  legend = TRUE,
  border = par("fg"),
  breaks = "quantile",
  min = NULL,
  max = NULL,
  ...
)

Value

Returns no value, just map swatch of colors in geographic space!

Arguments

x

A data frame or object of the class SpatialPolygonsDataFrame

values

Variable in the SpatialPolygonsDataFrame for which to discretize the values of the quantity.

col

A vector of colors

key_label

label for the color key

leg

Numeric, length of the legend

lwd

numeric, line width of the legend.

pos

location to position the legend such as “bottomright”, “bottomleft”, “topleft”, and “topright”.

legend

logical indicating whether to add a legend to the map.

border

plot polygons in SpatialPolygons object

breaks

one of “equal”, “pretty”, “jenks”, “quantile” or numeric with the actual breaks by specifying the minimum (min) and maximum (max) bounds.

min

the minima of the lowest bound of the break.

max

the maxima of the upper bound of the break

...

Further arguments passed to or from other methods.

Author

Barnabas H. Daru

See Also

SpatialPolygons-class

Examples

library(sp)
s <- readRDS(system.file("nigeria/SR_Naija.rds", package = "phyloregion"))
plot_swatch(s, values = s$SR)